Some random thoughts off the top of my head.
1. Western leaders prior to this generation were pro-Israel (generally) but not to this degree. The next generational shift among the mainstream elites isn't likely to reproduce the same loyalties, world-view etc., of the present lot, at least not entirely.
2. The Americans will be the last to go, but go they will. The bipartisan consensus on Israel is the last of the bipartisan consensuses there will ever be over there, for a long time to come at least.
3. Re: facilitating antisemitism - there were always anti-semites who were pro-Zionist, and that particular toxic mix has never gone away completely.
Just some random thoughts, that's all. . . .