Here are my thoughts as an attempt at being objective:
It's an interesting conversation because the top brass and head of the snake that is Hamas all dipped out to go abroad to evade prosecution/death. So you have the guys running the on the ground operations, from abroad in places like the aforementioned Syria, Iran, Lebanon, Turkey, etc.
I think the extrajudicial killing of these folks is fair war, even if they are abroad (again, their whole intent is to avoid being brought to justice by running from the conflict and operational area), but what seems to me as brazen and an overstep is the attack while on the mediator's soil, at a mediation discussing the first concepts of what peace would look like. I think Qatar has a right to be very upset at the whole thing but specifically even us and the smoking gun is "USA stopped Iran's missiles this summer easily, you COULD have done the same thing with Israel's missiles but obviously didn't. You obviously ok'ed this."
I also think the justification of 10/7 by Israel was weird. No duh. The whole thing is in response to 10/7. You can't really use that to justify this unless you are saying that you are going to get your pounds of flesh in revenge as a priority over peace first, which is an obstacle to peace here obviously.
The Jerusleum justification from last week holds more weight IMHO, but still didn't go far enough to justify the Qatar boming.