I have tried to learn as much as I can but only God gives interpretation.
Israel is God's witness but now Israel is two.
Isa 43:1 But now, thus says the LORD, who created you, O Jacob, and He who formed you, O Israel: "Fear not, for I have redeemed you; I have called you by your name; you are Mine.
Isa 43:6 I will say to the north, 'Give them up!' And to the south, 'Do not keep them back!' Bring My sons from afar, and My daughters from the ends of the earth--
Isa 43:10 "You are My witnesses," says the LORD, "And My servant whom I have chosen, that you may know and believe Me, and understand that I am He. Before Me there was no God formed, nor shall there be after Me.
The 144,000, woman of Rev 12 and 2 witnesses are all the same in Revelation. They are the remnant of Israel. The two houses and the bride.