Even your framing is giving Israel to much credit. Suppose everyone in that car was 100% a terrorist involved in the 10/7 attack.
You still do not get to target them while they are actively distributing humanitarian aid. Particularly if said distribution has been specifically coordinated with you (I haven’t seen specific reporting about this one, but in general the WCK deconflicts their movements with the IDF, for obvious reasons).
When even the official Israeli story is unconscionable, I don’t understand why we are even having a conversation about “if” they are committing war crimes
I suspect they are inclined to tell the Russians to kick rocks. However, they are going to need some foreign support. As long as they are on the US terror list, it will be very difficult for that help to come from any US aligned group.
Having said that, between the growing disagreement over Israel policy, the coming 4 years of a Trump administration, and the desire of a lot of European countries to resolve the Syrian Refugee crisis; I could see a lot of European countries going against the US on this one and helping the new Syrian government.