No, we are not to be unequally yoked with unbelievers, including unbelieving Jews/Israel. That is ecumenicalism, a deception. God called a remnant out FROM Israel, just as He called Abraham out from among the Gentiles. As it was prophesied, only a remnant of Israel would be saved. We need to distinguish between the "Israel of God" and "Israel after the flesh". We don't count earthly Jerusalem/Zion to be our mother, but heavenly Jerusalem/Zion is. Earthly Jerusalem sadly is called Babylon, Sodom and Egypt in scripture, spiritually. Doesn't mean earthly Jerusalem/Israel is entirely evil, but is a mixture of good and evil, in varying degrees, like anything to do with this fallen world (including our western politics).
The church's only mandate is the gospel, to "go and make disciples", not to be entangled with the geo-political affairs of this world, but let the Lord judge and deal with those things, as He IS doing and only He is qualified to do so. We may discern specific events/actions that are visible, but are not privy to everything that goes on out of sight, wheeling and dealing, stealing, murders, corruption etc. Not to mention biased news and biased histories. There is a lot that goes on in secret in this world and only God knows all the truth about any issue. People, nations and governments of this world act in their own self interests and according to whatever they can get away with, that is just the nature of the fallen world - how can we pick a side with those things when in truth there are none righteous, no not one. When the angel in the OT was asked whose side he was on, theirs or ours, the angel essentially replied "Neither. But in the name of the LORD do I come." I believe we should endeavour to be of the same mind as that angel. Our battle is spiritual and our weapons are not carnal either. We are in the world but not of it - friendship with the world is enmity with God - come out from among them and be ye SEPARATE, says the Lord, not be joined/united with them.