Assuming, for a moment, that this were true (there is no reason to believe it is - plenty of, specifically, international former doctors who worked at Shifa have come out to call BS, and there have been equally as plenty, if not more, instances of the IDF having been shown to just blatantly be lying ...). But, just for a moment: assume this is true!
It is STILL morally unjustifiable to deliberately target doctors, nurses, patients, and internally displaced refugees!
Some of us are old enough to remember "targetted assassinations", you see. Used to be a thing that Israel used to love. And, yes, sometimes some civilians died - but not at that level!
The only, really, the ONLY possible justification for what Israel is doing these days is "well, I just genuinely believe Israeli lives are worth more".
... in which case: anyone who thinks that is a fucking racist - but at least they will be an intellectually honest, internally consistent fucking racist!