Who cares if it is racism? The mishna, the second holy book of the Jews (Karaites only have Torah, Jews have mishna) says in tractate Eduyot if I remember well that it is indeed forbidden to rent a house to a Gentile in the very Eretz Yisrael, however not a field. As long as it's forbidden for Jews from the source, who cares the consequences? Is Israel a Jewish state or not?
Woman moderately wounded by firebomb thrown at her car in north J'lem (Haaretz)