Your last question was posed to FDR by ibn Saud during their meeting aboard the Quincy. It seems fair, but given that the question is one of homeland, a place to live, there was no way Europe could supply that. Not after being the source of more than one thousand years of exterminationist antisemitism. Jews had to be someplace else, & given that Zionists had already settled in Palestine, there it was.
Herzl did reference transfer, yes, in his diary. I don't think it ever became official policy in his time. And, even later, Jabotinsky for one, opposed forcible transfer.
It's interesting you bring up Deir Yassin, because even today there is some controversy about what happened, & the degree or intent of the militias. Ironically both sides, Arab & Jew, exaggerated the violence, though for different reasons.
Now that Israel has attempted to escalate the war in Gaza with the attack on the Iranian consulate, conceivably drawing the US further in I no longer know what to think ... it's highly likely there are no sides worth supporting in this conflict anymore.