It was the Democrat president that bypassed congress twice to send munitions to Israel during it's active genocidal campaign so no, it's not Republicans.
Also, Republicans want to send weapons and money to Israel and not to Ukraine, while Congressional/Biden admin Democrats want to do both. So with Republicans you get double the genocides.
It would work. Senator Sanders forced a vote to require the State department to report on Israel's humanitarian violations or immediately withhold aid, and the Senate quickly voted 72-11 against the proposal. That is probably the most bi-partisan vote we've seen in decades. But don't go thinking that the enormous American political machine actually represents the will of the American people. They represent corporate interests, and hardly even try to hide that anymore.
Yes, a number of users on Lemmy have made that claim, and this article shows references of it being done by various media outlets and other political pundits.
David Friedman, the conservative former US ambassador to Israel during Donald Trump’s presidency, went further, tweeting before Monday’s protest: “Any American Jew attending this rally is not a Jew – yes I said it!”