It's not hard to find explicitly anti-war protests from organizations on the Israeli left, but if you yourself were building a program to mobilize opposition to the war in Gaza, what would you lead with? Every march for the return of hostages is implicitly (or explicitly) demanding that Netanyahu complete a ceasefire deal with Hamas. 3/4 of polled Israelis now want Netanyahu gone, and the numbers don't get much better for his defense and intelligence teams.