That is an ignorant assumption. Let's analyze that. If the they are already IN CHRIST, WHY WOULD THEY NEED TO BE SEALED BY THE HOLY SPIRIT ...AGAIN?
I assure you, I'm not struggling at all with what God's Word as written has shown me.
Instead, it is you that is struggling, and don't even know it yet, because the idea that some unbelievers of Israel will convert to Jesus 'during'... the coming
"great tribulation" is nowhere written in God's Word, but instead is a false assumption from men's false doctrine of a Pre-trib Rapture Theory. That is who made up the un-Biblical term, 'tribulation saints', as you won't find that term anywhere written in The Bible.
And your above idea that if those 144,000 of Israel are already sealed today, that they have to be sealed again, is another silly ASSUMPTION coming from left field that is nowhere written in God's Word. It's not even an idea with ANY truth behind it. You just made that up trying to use that as canon fodder against what that Rev.7 Scripture clearly shows.
FOR BRETHREN IN CHRIST NOT IN CONFUSION ABOUT REV.7:
I'm making this easy... to understand. If brethren find understanding this difficult, then they need to get busy in deeper study of God's Word as written, and stop keeping men's doctrines.
Only if you know your Old Testament history about God having split the old nation of Israel into two separate kingdoms in the days of Solomon, would you possibly begin to understand who those 144,000 of the seed of Israel are, and how they are directly related to Christ's Church. Folks like Bruno aren't going to understand this because he is deceived by Satan's false Pre-trib Rapture theory which teaches Darby's false Dispensationalist theory claiming the Church is raptured PRIOR to the great tribulation, while the nation of Israelites are left-behind to go through the tribulation.
1. Because God's Word reveals how unbelieving Israel will be deceived during the tribulation because of the "
spirit of slumber" Paul said God put upon them per Romans 11, they will remain deceived all... throughout the tribulation, and only wake up to the Truth when they see Jesus coming. Lord Jesus showed this specifically about the deceived unbelieving
"Daughters of Jerusalem" and her children, in Luke 23:27-31. And Rev.9 shows only those NOT sealed will be deceived and thus subject to the stinging of the locusts.
2. Who is God's Seal for then?
ONLY... those in Christ Jesus. That sealing is about the Gospel Promise by Faith on Jesus Christ which causes the BELIEVER to be sealed by The Holy Spirit (Eph.1:13; Eph.4:30). And per Rev.9, it reveals specifically WHEN God's Seal at the end of this world is for, i.e., during the
"great tribulation" which Christ's Church WILL go through, because Lord Jesus said in Matt.24 and Mark 13 that He will come to gather His saints only
AFTER... that great tribulation.
3. Where knowing your Old Testament history helps with understanding about the 144,000 of Rev.7 is that out of all the tribes mentioned there in Rev.7, only THREE of those tribes represent the JEWS today. But ALL... of those tribes mentioned there are to be SEALED with God's Seal to go through the
"great tribulation" so as to not be deceived by the coming false-Messiah which comes first.
4. The 3-tribe
"house of Judah" is represented by the Jews today, and only are made up of the tribes of Judah, Benjamin, and Levi. So that's only 36,000 out of those 144,000 thousand.
5. The rest of those 144,000 sealed Israelite tribes, the "
house of Israel", represent the ten lost tribes of Israel, which really are not lost at all to God. Those ten tribes went captive out of the holy lands first, never to return as a people, and they lost heritage and self-identity as the larger part of Israel. They eventually migrated into Asia Minor and Europe to form the early Christian Churches. This means the rest of that 144,000, the 84,000 out of those tribes of Reuben, Gad, Aser, Nepthali, Manasses, Simeon, Issachar, Zabulon, and Joseph. (Tribe of Dan is left out, likely because of their being first to fall into idol worship).
6. The above means those 144,000 sealed of the seed of Israel are already part of Christ's Church today, especially those tribes that made up the historical
"house of Israel" which migrated mainly to the West to fulfill the Genesis 48 "multitude of nations" prophecy that Jacob passed on to Joseph's son Ephraim (Genesis 35; Genesis 48). That "multitude of nations" which the tribe of Ephraim would become represents the western Christian nations where the majority of ten tribes migrated to.