The early immigration certainly caused issues between two groups and I do think that the decision to support the zionists of the time was incorrect. For many, the purpose seems to have been to reduce their own Jewish populations.

While still a cause of tension, immigration was much lower before the war. The result was just as you said, European Jews were faced with an existential threat a few years after the holocaust.

One of the things I found quite interesting was that Palestine wasn't the only option considered by early Zionists. At some point places like Argentina and Uganda were potential candidates.