The general figure given for Jewish support to one degree or another for Israel in the US: where the largest group of Jews outside Israel live is around 80%-90%. It's easy enough to Google though the degree of "support" varies according to how the question is phrased. The least ambiguous figure is that only around 10% of Jews describe themselves as Anti Zionist.

There's been a lot of noise about support for Israel falling: especially amongst younger jews, so you might see fit to quibble or quote more recent figures, yet considering the genocide, theres a long way to fall to reach even a modicum of plain ordinary morality: whatever the present numbers it's still obscene.