"They shall not dwell in your land lest they make you sin against Me"—Exodus 23:33.
We must not allow idol-worshippers to dwell in our midst in the Holy Land, lest we learn from their heretical ways. And it is certainly forbidden to sell or even rent real estate to an idol-worshipper in the land.
In fact, if an idol-worshipper wants to pass through our land while en route to his final destination, we do not allow passage unless he forswears idolatry.