Most of the Russians in Israel hate Russia. They fled to Israel because of persecution. Not to mention that a lot of immigrants in Israel are actually from Ukraine.

Israel has already chosen a side - they’ve been sending huge amounts of humanitarian aid to Ukraine, set up field hospitals, share intelligence, sent drone detection systems (through intermediaries in Poland).

The Palestinians on the other hand have openly chosen to side against the Ukrainians and have been visiting/paying homage to Putin.