It's quite difficult to determine if Israel's strikes have all been proportionate or not (I mentioned this earlier). Rarely do we have enough information to determine that with any degree of certainty.
Israel can reasonably argue that they follow the principle of distinction reasonably well (with some notable exceptions), but proving that they follow the principle of proportionality is a lot harder. They are not always forthcoming with the precise military gain expected in some high profile strikes (as in the case of two notable strikes during the current conflict that killed in excess of 50 people, mostly civilians), and when they are forthcoming their level of detail in public is modest (as in the case of the Jala Tower strike). I'm not surprised about this, but it makes it hard to determine whether they have appropriately weighed things. Similarly, we don't have a clear understanding of what calculation goes into estimating civilian casualties and property/environmental costs and whether those are realistic and appropriate - especially for choice of munition.
I am encouraged that Israel, like most Western powers, has established a relatively robust vetting process for target/munition selection and strike approval (this is for pre-planned strikes, things like CAS are a lot more fluid but are also judged with a lot more leniency). The existence of such a process, however, does not mean that they always (or even mostly) get it right. Let's not make blanket claims of proportionality either way when we simply don't have enough information to judge. It's reasonable to say either 'X strikes seem to be achieving very little compared to the cost, unless Israel provides some evidence to the contrary', or 'Y strikes seem to be justified since they were targeting Z important military objectives and they appear to have put in substantial efforts to minimize the civilian losses'. But let's not speak with any certainty.



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