Your "socialist" argument is a weak attempt to hide behind a political label. It doesn't matter what they called themselves. The "socialist"[1] Haganah and Palmach were the main engines of the Nakba. The distinction between them and the Irgun was a public relations strategy, a "good cop, bad cop" routine for the same unified colonial project of dispossessing Palestinians.
The Altalena was a colonizing force consolidating its monopoly on violence to better oppress and dispossess the Palestinians. You cannot compare that to a occupied population struggling under a foreign military boot. Palestinian "leadership problems" and disunity are a direct result of decades of Israeli assassinations, imprisonment, and engineered fragmentation.[2]
[1] 'The Dark History of "Left-Wing" Zionism' https://www.youtube.com/watch?v=ehp9PZo4UR0
[2] https://www.jpost.com/arab-israeli-conflict/netanyahu-money-...