Jewish voters are largely located in states that vote Democrat. So I agree, it would take a dramatic shift to make a dent in then outcome of the electoral college.
It is also a mistake to think of Jews as a block for Israel. They are not Israelis, they are Americans and they vote based on interests that effect them and the country as Americans. I disagree with most of them, but it is what it is. We have to try to change their minds with reason.
In the meantime, what really needs to happen is for the Jewish vote to throw its weight towards Republican candidates for other offices. Getting rid of the Waxman’s and Schumers would be far more effective - even wrt Israel - because with these guys gone there would be less cover for any Democratic president of the future. It would also be a fitting way to punish the President, by hurting his party and dividing it.
Very difficult to reason with addicts - either political or chemical - because their thought and behavior are so irrational and self-destructive, yet they find satisfaction in persisting in what they do.