This person is a racist as well as ignorant of Jewish history. All he needs to do is to read the Tanach. He will see that David, himself, inducted non-Jews into the miltary. Look at the case of Uriah, the Hitttite, who gave his life in the defense of the Jewish people.
Suspect Bangkok bomber arrested, found with possible bomb-making materials (Reuters)
from the article: Habayit Hayehudi MK: I don't want Arabs in IDF uniform