The complete paganism of the Tri-quetra (triquetra, sometimes known as the 'celtic-knot'), and it's anti-Christian purpose, and it's ties to the false and deadly heresy of the Roman Catholic 'trinity'.
History:
Attempting to make an image or symbol that represents Godhead (Deity) is forbidden in scripture, and is condemned by the Law of God, as found in the first and second commandments:
When the Israelites attempted to make an image, that represented JEHOVAH Elohiym, God revealed to them their error:
Exo 32:4 And he received them at their hand, and fashioned it with a graving tool, after he had made it a molten calf: and they said, These be thy gods, O Israel, which brought thee up out of the land of Egypt.
Exo 32:5 And when Aaron saw it, he built an altar before it; and Aaron made proclamation, and said, To morrow is a feast to the LORD.
Exo 32:6 And they rose up early on the morrow, and offered burnt offerings, and brought peace offerings; and the people sat down to eat and to drink, and rose up to play.
Exo 32:7 And the LORD said unto Moses, Go, get thee down; for thy people, which thou broughtest out of the land of Egypt, have corrupted themselves:
Exo 32:8 They have turned aside quickly out of the way which I commanded them: they have made them a molten calf, and have worshipped it, and have sacrificed thereunto, and said, These be thy gods, O Israel, which have brought thee up out of the land of Egypt.
Exo 32:9 And the LORD said unto Moses, I have seen this people, and, behold, it is a stiffnecked people:
Exo 32:10 Now therefore let me alone, that my wrath may wax hot against them, and that I may consume them: and I will make of thee a great nation.
They attempted to justify their actions by saying it was not an image of a false god, but a representation of the true God. They transgressed the Law of God, which is sin (1 John 3:4), and Moses showed this by breaking the physical tables of stone where upon was the Ten Commandments:
History:
"The term triquetra in archaeology is used of any figure consisting of three arcs, including a pinwheel design of the type of the triskeles. Such symbols become frequent from about the 4th century BC ornamented ceramics of Anatolia and Persia, and it appears on early Lycian coins.[1]
The triquetra is found on runestones in Northern Europe and on early Germanic coins. ..." - Triquetra - Wikipedia
"... The Triquetra, a type of triangle, represents the three stages in life: Maiden, Mother, and Wise-Woman. ..." - https://sites.psu.edu/keepyourculture/2019/04/03/the-celts-thriving-in-spite-of-globalization/
"... the design is used as a religious symbol adapted from ancient Celtic images by Christianity. It is similar to Odin's symbol, the valknut. ..." - http://self.gutenberg.org/article/WHEBN0001466712/Triquetra
The triquetra is found on runestones in Northern Europe and on early Germanic coins. ..." - Triquetra - Wikipedia
"... The Triquetra, a type of triangle, represents the three stages in life: Maiden, Mother, and Wise-Woman. ..." - https://sites.psu.edu/keepyourculture/2019/04/03/the-celts-thriving-in-spite-of-globalization/
"... the design is used as a religious symbol adapted from ancient Celtic images by Christianity. It is similar to Odin's symbol, the valknut. ..." - http://self.gutenberg.org/article/WHEBN0001466712/Triquetra

Attempting to make an image or symbol that represents Godhead (Deity) is forbidden in scripture, and is condemned by the Law of God, as found in the first and second commandments:
Exo 20:1 And God spake all these words, saying,
Exo 20:2 I am the LORD thy God, which have brought thee out of the land of Egypt, out of the house of bondage.
Exo 20:3 Thou shalt have no other gods before me.
Exo 20:4 Thou shalt not make unto thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth:
Exo 20:5 Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me;
Exo 20:6 And shewing mercy unto thousands of them that love me, and keep my commandments.
Exo 20:2 I am the LORD thy God, which have brought thee out of the land of Egypt, out of the house of bondage.
Exo 20:3 Thou shalt have no other gods before me.
Exo 20:4 Thou shalt not make unto thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth:
Exo 20:5 Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me;
Exo 20:6 And shewing mercy unto thousands of them that love me, and keep my commandments.
When the Israelites attempted to make an image, that represented JEHOVAH Elohiym, God revealed to them their error:
Exo 32:4 And he received them at their hand, and fashioned it with a graving tool, after he had made it a molten calf: and they said, These be thy gods, O Israel, which brought thee up out of the land of Egypt.
Exo 32:5 And when Aaron saw it, he built an altar before it; and Aaron made proclamation, and said, To morrow is a feast to the LORD.
Exo 32:6 And they rose up early on the morrow, and offered burnt offerings, and brought peace offerings; and the people sat down to eat and to drink, and rose up to play.
Exo 32:7 And the LORD said unto Moses, Go, get thee down; for thy people, which thou broughtest out of the land of Egypt, have corrupted themselves:
Exo 32:8 They have turned aside quickly out of the way which I commanded them: they have made them a molten calf, and have worshipped it, and have sacrificed thereunto, and said, These be thy gods, O Israel, which have brought thee up out of the land of Egypt.
Exo 32:9 And the LORD said unto Moses, I have seen this people, and, behold, it is a stiffnecked people:
Exo 32:10 Now therefore let me alone, that my wrath may wax hot against them, and that I may consume them: and I will make of thee a great nation.
They attempted to justify their actions by saying it was not an image of a false god, but a representation of the true God. They transgressed the Law of God, which is sin (1 John 3:4), and Moses showed this by breaking the physical tables of stone where upon was the Ten Commandments:
Exo_32:19 And it came to pass, as soon as he came nigh unto the camp, that he saw the calf, and the dancing: and Moses' anger waxed hot, and he cast the tables out of his hands, and brake them beneath the mount.
Deu_9:17 And I took the two tables, and cast them out of my two hands, and brake them before your eyes.
Exo 32:21 And Moses said unto Aaron, What did this people unto thee, that thou hast brought so great a sin upon them?
Exo 32:22 And Aaron said, Let not the anger of my lord wax hot: thou knowest the people, that they are set on mischief.
Exo 32:23 For they said unto me, Make us gods, which shall go before us: for as for this Moses, the man that brought us up out of the land of Egypt, we wot not what is become of him.
Exo 32:30 And it came to pass on the morrow, that Moses said unto the people, Ye have sinned a great sin: and now I will go up unto the LORD; peradventure I shall make an atonement for your sin.
Exo 32:35 And the LORD plagued the people, because they made the calf, which Aaron made.
Deu_9:17 And I took the two tables, and cast them out of my two hands, and brake them before your eyes.
Exo 32:21 And Moses said unto Aaron, What did this people unto thee, that thou hast brought so great a sin upon them?
Exo 32:22 And Aaron said, Let not the anger of my lord wax hot: thou knowest the people, that they are set on mischief.
Exo 32:23 For they said unto me, Make us gods, which shall go before us: for as for this Moses, the man that brought us up out of the land of Egypt, we wot not what is become of him.
Exo 32:30 And it came to pass on the morrow, that Moses said unto the people, Ye have sinned a great sin: and now I will go up unto the LORD; peradventure I shall make an atonement for your sin.
Exo 32:35 And the LORD plagued the people, because they made the calf, which Aaron made.