You are right. Something like 3/4 of the world’s Muslims aren’t Arab.
However, there has always been a strong strain of Arabocentrism in Islam from its very beginning. Muhammad and his immediate successors had great difficult in accepting non-Arab converts as more than clients of Arab Muslims. To some extent this ethnocentrism has continued till now. The Arab language, for example, is portrayed as the one the Koran existed in prior to the creation of the world. IOW, Allah speaks Arabic.
But Your Headline screams Jews versus arabs its like saying a Singaporean that speaks English is British!