I think it's an unreasonably high standard to expect Israel to vaccinate Palestanians in the occupied territories before Israelis. Going from that stance to saying (all?) Israelis treat Palestinians as subhuman is also a bit of a stretch. Are Americans treating Canadians as subhumans by not allowing Pfizer to ship vaccines from its US factory to Canada? In Judaism "the poor of your city" come first. What other country in the world is giving their bought vaccine allotment first to someone else or promoting anything that looks like worldwide equal distribution where every human on this planet has equal access?
And sure, as a fellow Jew I'd like to believe we're better than everyone else, but hey, we're not. I guess maybe better than some.
The complexity of the Palestinian/Israeli conflict can't be reduced to these simplistic terms. Anyone can take some specific incident or piece of data out of context and make their case around it, and all sides take every opportunity to do so while at the same time refusing to accept any responsibility to how they got to where things stand today.
I do hope that once Israel has finished vaccinating its population it will extend the additional vaccines to the PA and to Gaza, I think it's in their own interest and it's the right thing to do.