None of the liberals I know support the palestinian genocide by israel

Yes they do

They may not say it aloud, they likely won't encourage Israel to kill em all. But they'll handwring and hem and haw about how just darn uncivil those Palestinians are and how regrettable the violence is but Israel has to defend themselves etc etc

The outcome is the same. They'll tut and fingerwag at Israel but won't raise a finger against the genocide.