There is no need for de facto or de jure debates about borders. All of that land is Israeli for the time being, and they can build whatever they want wherever they want.
This is not to say that I find the current state of affairs perfectly suitable, but there is no border between Israel and "Palestine" because there is no country called Palestine.
If all that land is Israeli, then all those people should be allowed to vote for the Knesset.
I think he got it. If they're Israeli then they have the right to vote and all the other rights of Israeli citizens. If they're not then they don't have to be given voting rights.