India/Pakistan was also a mistake, but it's hardly comparable. Both Hindus and Muslims had inhabited the subcontinent for many centuries.

I do think Jews who expelled should be recompensed. Do you have a source for your claim that their land and money amounted to a lot more? My understanding is the Jews who left other countries sold their land. Clearly, the dispossessed Palestinians did not.

That something happened many times in the past does not justify it happening in the last hundred years.