I think, again, WWT, you're not entirely accurate. As I recall (from research, not being there.
) the British set limitation on Jewish immigrants by only allowing in immigrants with £1,000 (I think £1,000 then was somewhere near £50,000 now).This was later lowered to £500,or it may have been t'other way round.
However once the Arabs objected, an annual limit was applied, except that the British allowed something called "The Jewish Agency" to issue immigration visas and that organisation totally disregarded the annual limit.
Land was bought by the Jews under the auspices of "The Jewish Land Fund" or something like that.
However, there was still far more illegal immigration going on.
But even then, at partition, there were 30% Jews who owned only 3% of land.
Under the partition, they were awarded 55% of the Palestinian land.
So going back to the original comment by Vinty, and as you've said the two are not comparable, the indigenous people were not overwhelmed by immigrants. It was the partition that created tension and conflict.