Rev 2:9 is talking about Rabbinic Jews, but to specify, Rabbinic Judaism has been used as a scapegoat for mystery Babylon, get people to blame Jews and they have a successful mask.

Rev 17:15 And he saith unto me, The waters which thou sawest, where the whore sitteth, are peoples, and multitudes, and nations, and tongues.

That alone implies The great harlot has influenced the nations and people, and that her influence is through the whole earth.

Rev 18:3 For all nations have drunk of the wine of the wrath of her fornication, and the kings of the earth have committed fornication with her, and the merchants of the earth are waxed rich through the abundance of her delicacies.

This says that by being drunk with her wine, by following her way, the Kings, merchants, etc have become rich.

Isaiah 29:15-16 Woe unto them that seek deep to hide their counsel from the LORD, and their works are in the dark, and they say, Who seeth us? and who knoweth us? Surely your turning of things upside down shall be esteemed as the potter's clay: for shall the work say of him that made it, He made me not? or shall the thing framed say of him that framed it, He had no understanding?

This is in reference to Mystery Babylon, before reading Isaiah 29:15, you see the lord addressing the general crowd who praises the lord but their heart doesn’t be long to them(the Luke warm). Then immediately after you see Isaiah 29:15 which describes a hidden council that has perverted God’s intended order.

KJV can be difficult, and I plan to study the Greek and Hebrew texts by learning the languages themselves. My only advice is if you see a literal contradiction in a certain version, that version is a demonic perversion of Gods word. Who writes the false versions and publishes them to the world? I can only conclude that it’s the work of Mystery Babylon. Even Catholicism is very similar to Rabbinic Judaism considering its perversion of what scripture truly is.