What If The Arabs Accepted The Partition

I guess it isn't discussed much because it is like wondering what if we had money trees in our backyards. Anyways, back to the point.
Jews were given 55% of the Holy Land, the Arabs were to get around 40%. Under that plan, the Jews would rule the Jewish land and the Arabs would rule the Arab land.
Fact is, Arabs have higher birth rates than Jews. Pretty soon, the Arab population would have greatly outnumbered the Jewish population.
Of course, for this to happen, there would have to be complete peace, and tensions would have to have been immediately resolved.
Honestly, I don't think the Jews would mind, as long as Jews could immigrate to Israel and there was peace with no chance of genocide.
Jews don't mind it in the USA, and we only make up 2% of the population. We only need 1.4% in order to control things anyways.