Those teaching / following false doctrine are in opposition to the Lord walking after the flesh and are too slow and ignorant of God's Word that they don't even know it. Very sad for them.
Too bad you don't accept the whole counsel of God because if you did you would believe the warnings the Lord gave concerning many false teachers coming in to the church deceiving many which is where we are at now as the time has come when they will not accept sound doctrine.
You apparently don't read many of my posts. I am constantly warning brethren about the false 'crept in unawares'. I have even given a more complete Bible Scripture history about those "tares" that began creeping in among Judah back in Old Testament times, and even in Jeremiah 24 where God pointed to them as the evil basket of figs joined with Judah that returned to Jerusalem from Babylon, and crept into Israel's priesthood and scribe positions by the time of Jesus' 1st coming!
So it looks like you are 'just now'... maybe, realizing where Apostles Paul and Peter's warnings come from about false prophets creeping into Christ's Church pushing doctrines of devils in the last days. (2 Peter 2; Acts 20:27-31) Apostle John spoke about it in 1 John 2:18 with his warning about the coming "antichrist" and specifically the "many antichrists" already at work he said.
All these Scripture ideas are about that crept in unawares subject:
1. Old Testament "
bondservice" (1 Kings 9:21, leftover Canaanites that Israel was not able to destroy that became bondservants in Israel. Includes the Canaanites that Joshua met on the road which disguised themselves per Joshua 9.)
2. Old Testament "
Nethinims" (Ezra 2:58, Nethinim means given to Temple service)
3. Old Testament
"families of the scribes" (1 Chronicles 2:55; these were the Kenites of the lands of Canaan per Genesis 15, non-Israelites in charge of keeping the letters of God's Word from generation to generation. These scribes joined with the Pharisees that wanted Jesus killed.)
4. New Testament "
tares" (Matthew 13; Jesus explained these "
tares" are the children sowed by the devil, so it goes back to the idea God said in Genesis 3:15 that He would put enmity between Satan's seed and the Seed of the Woman that Christ would be born through.)
5. The scribes and group of Pharisees of John 8 that wanted to kill Jesus (Jesus said to them that their father was the devil, that he was a liar and a murderer from the beginning, pointing directly to the children of Cain.)
6. New Testament
"brute beasts" (2 Peter 2, those whom Peter was warning the Church about that would creep in at the last days. Also mentioned in Jude 10.)
7. New Testament
"certain men crept in unawares" (Jude 4, the same "brute beasts" Peter warned that would creep in.)
8. New Testament connections on the subject --
"many antichrists" already at work; the
"mystery of iniquity" already at work; "
tares" mixed in with the good wheat; natural
"brute beasts";
"the way of Cain"; "
children of this world".
At one time or another in my posts, I brought the subject of those false ones up, mostly to of no avail, because the majority of brethren don't study all their Bible enough to know about them.