No rate is acceptable. The debate is not about abiding to any modern war KPIs but rather the intent to minimize civilian casualties. Israel definitely does NOT do that by actively engaging with their current strategy of retaliation and that's already enough to say that, from a human perspective, Israel needs to stop right now and enable any sort of progression into a longer holding peace in that area.
I'll rephrase. What rate do you expect in city fights against the enemy mixed with civilians and actively using them as human shields, assuming that the attacking side makes reasonable effort to minimize civilian casualties.
> intent to minimize civilian casualties
Intent is very hard to argue about. Especially when talking about proportionality which is not rigorously defined. Numbers are easier to argue about. It is reasonable to expect that civilian casualty rate will be higher in cases where there is no intent to minimize civilian casualties compared to cases where it is; comparing numbers with conflict in similar conditions where you believe there was such intent is a good starting point
> enable any sort of progression into a longer holding peace in that area
Getting rid of terrorist government who promised to repeat 7th of October looks like necessary condition for peace.
