Muslims in our military today makes as much sense as having Nazis in our military during WWII.
We certainly had communists in our military back then, and for a few years after.
But your point is well taken.
We had ethnic Germans in the military as well, just as we have ethnic arabs today.
But in the same way that an ethnic German is not the same as a Nazi, an ethnic arab is not the same as a Muslim.
But we all know “ethnic Arabs” are not the ones being talked about here, in general.