This is true. Bosniaks, Albanians, and other white Muslims would not get singled out like this, though they also do not speak Arabic, so perhaps that's part of it. I think Americans have been sort of trained by this point to see Arabic as a scary brown person's language, which...ughhh...دماغسز...
The same thing happens to Christians, by the way, if they happen to be Middle Eastern, even if they are not Arab-identifying or Arabic speakers.
Here is a story of a Chaldean Catholic woman from Iraq who was nearly beaten to death in Albuquerque, NM (Chaldean Catholics traditionally speak Neo-Aramaic as a native language, not Arabic) while I lived there. This happened in the same area of town where several parishioners of my church lived, including one who had moved there because his neighbor at the previous house was a crazy lady who threatened to call the NSA on him because she thought he was a terrorist. His name was George, and he was a deacon in the Church who had come to America about three years earlier from Egypt to get a computer science degree; not scary at all, but events like this put everyone on edge whether they're Muslim or not, for sadly obvious and sensible reasons.
This brainless fear of everything and everyone who even
seems Muslim to dumb people has to stop. It's not illegal to be Muslim (or non-Muslim, but from the Middle East) in America, but treatment like what this guy got from Southwest Airlines ought to be.