Israel would object to aid and weapons flows into Gaza. It would be fine with Gazans leaving the Strip. The problem is there are currently zero takers globally for a significant Palestinian refugee population, in part, as other comments have mentioned, due to the history of Palestinian refugee populations in the Middle East. (To my knowledge, Palestinian Americans have been fine and productive members of society.)
I do wonder if you all can hear yourself: a lot of subtle implications of genetic defects in Palestinians' character and selective understanding of geopolitics in the region, or just basic societal dynamics.
I invited another commenter to transpose their reasoning to groups it's less popular to openly discriminate, I'd suggest you do the same.
"Saying that gays steal does not make you homophobic": technically true, but you're being selective with your understanding of facts.
Most states (talking about decision-makers, not populations) don't want to take in large groups of refugees, not because of their genes or politics, but because it has a cost and risks (in terms of integration, gov perception, fuelling far right parties, etc.). Nothing to do with Middle-Eastern/Palestinian.
Even though there are examples of massive refugee intakes by states, everywhere, including in the Middle-East, including of Palestinians, including voluntary.