I have no clue what the wood stool bit is supposed to be, but I suspect that he got a lot of Jewish support the first time he was up for election because he was liberal as hell, which generally fits the voting preferences of New York Jews, but it wasn't clear at that time just how much he hated Jews and Israel.
Yeah, I suspect that a lot of the Jews in his district are either ambivalent, or actually hostile, towards Israel and Israeli politics in general, and would have continued to support him...
Except when he went full-bore anti-Semite, started supporting pro-Palestinian protestors, even the violent ones who were calling for the destruction of Israel and then tried to claim the "From the river to the sea" chant isn't actually hate speech nor does it call for the destruction of Israel.
My gut tells me that October 7, and the response to it by a lot of people both in the United States and around the world, finally made them realize that the Holocaust isn't just something from history... it's something that could happen again.