I can only assume that he doesn't believe in a Jewish right of return to Jordan or Biblical geography.
Look. I'm Jewish (more than most, too) and even I don't believe in some Biblical right of return. That's just not the way the world works. But virtually no one was living in the "Holy Land" according to Mark Twain's apolitical account. Jews ("Zionists") came along and decided to by up the land their from the Turks who were absentee owners there, and thought they were taking the Jews to the cleaners. These Jews continued to buy land when Britain took over; and they still try now that Israel is in charge. The Arabs who didn't sell or abandon their land are still there, except in cases of eminent domain takings which all governments engage in. The idea that anyone should give up what they purchased legal title to some goat herder who thinks his great-grandparents lived there sometime is counter to almost all property laws everywhere.
ML/NJ