I'd like to add, dragging in Hitler because none of WW2 can be explained without him, and the parent poster posted details about the conflict that immediately preceded the independence of the state of Israel. Right before that, WW2 happened and so what happened in the 2 cannot be seen separate from each other.
Hence both sides' behavior during WW2 should be seen as part of the context of what David Ben-Gurion was doing, and Palestinians ... chose a side, let's put it that way.
You purposely trying to claim Hussaini was 'the pope' of Muslims as though he was a central figure of authority that spoke for Muslims/Palestinians just shows how biased you are - not surprising, given your constant bias on this topic on many other posts.
A cursory study on Islam will show you that Islam doesn't have a central figure of authority like the Pope. Therefore what Hussaini did, was him as an individual, and not a decision that can be attributed to all Muslims/Palestinians.
So the fact remains that Zionists as a group collaborated with the Nazis. Hussainin acted as an individual.
Hussaini was the Grand Mufti of Jerusalem from 1921 to 1937, described as the chief Muslim legal-religious authority in Jerusalem under the Mandate. He was also president of the Supreme Muslim Council, giving him major control over Muslim religious institutions, waqf funds, courts, schools, appointments, teachers, and preachers. He later presided over the Arab Higher Committee, the main umbrella body of Palestinian Arab politics during the 1936–39 revolt. He was one of the most important Palestinian Arab religious-nationalist leaders of the Mandate period and a Nazi collaborator.
It's not very logical to condemn Zionists asking Nazi Germany to send Jews to them instead of the camps and then minimise Hussaini's importance and far deeper collaboration.
https://en.wikipedia.org/wiki/Amin_al-Husseini