UNRWA being infiltrated would at least be theoretically plausible (even though Israel is lacking evidence even for that, apart from a small number of workers).

But this argument falls flat when essentially EVERY aid and human rights organization that operates in the strip is saying the same thing. (With the notable exception of one: The GHF)

Claiming that the ENTIRE global human rights system is engaged in a coordinated misinformation campaign against Israel is conspiracy theory levels of delusional.