Its generally unnoticeable but highly politically incorrect
If we spent more time killing the enemy during a war and less time worrying about pissing them off or hurting their feelings, we might actually win one of these things. I doubt that Islamic extremists are going to become more of a threat due to an obscure, barely noticeable scripture reference. To them, this already is
a Holy War - it's called Jihad.
The decision to remove these markings should not be a PC move, but a Constitutional one. That's in a perfect world, though.