Isaiah 48

CLAIM: the Great Tribulation is the context for refining and testing Israel (v. 10) and Jesus will have His inheritance (His glory) at the end of the age. God will restrain His anger so that Israel is not utterly destroyed.

red False.

Again, historical.  God has released His glory to us.

I have given them the glory that you gave me, that they may be one as we are one

John 17:22

This applies to the apostles and to “all who are afar off”.  We await the day when the knowledge of that glory will cover the Earth as the waters cover the sea (Habakkuk 2:14). We await the fullness as in it filling the Earth, but the glory is already given to the saints.  Verse 20 indicates is historical context in the command to leave Babylon.