The people any deal needs to be satisfy are those voting in the promised referendums on either side. Palestinian leaders can't sacrifice right of return without consent from voters, and there are 650 000 Palestinians from Syria who are now refugees second time.

If Israel can take average of up to 100 000 people of Jewish descent per year, it can take for example 50 000 of them and an equivalent number of Palestinian refugees per year in the future without any demographic change. And the equivalent number to any illegal settlers remaining on the occupied areas.