Wrong - the remnant was saved in 1st century as we read in the NT - these are labeled the 144,000 of the twelve 12 tribes in Revelation and written to by James and Peter:
James 1:1 James, a servant of God and of the Lord Jesus Christ, to the twelve tribes which are scattered abroad, greeting.
I don't see 12 tribes in "Israel" - all there is a a load of European immigrants.