"White" is a color, often used to refer to humans of primarily European extraction. No human is actually white, unless afflicted with extreme albinism. As an experiment, place your hand on a piece of printer paper (or put the paper where there is no suntan) and see if they are the same color.

"Muslim" is a religion, and adherents to that religion may be of any "pure" or mixed racial background. The largest single ethnic group among Muslims is South Asian, into which I'd put Tamils, Bengalis, Indonesians, Pakistanis and Filipinos, among others. Arab Muslims are generally racially indistinguishable from many South (Spanish and Italian) and Southeast (Balkan, Turkish and Greek) Europeans...and many Israelis.

So, guess what? Those "Muslims" were probably as "white" as you are.