I agree with you on that, except that the once great majority of Jewish votes for the most vile of Israel haters (i.e., the doctrinaire lefties, or, with few exceptions, the Demonrats) is gradually shrinking. There will come a time when that great majority won't be a majority at all - if we still have free and fair elections in the US, that is.
It’s demographics. Jews are either getting more religious or assimilating ‘til they no longer regard themselves as Jewish. Those who are more religious have more kids and move further right. So time is on the side of common sense.