They say the Quran forbids Muslims to swear allegiance to the U.S. Constitution.
No, really, what does the Quran actually say?
Given that the Quran was written in the 7th century, I find it a little hard to believe that it "forbids Muslims to swear allegiance to the U.S. Constitution."
I realize that it may say something from which that interpretation is derived, but WHAT exactly is that?
BTW, the Quran can be quoted just like the Bible: book, chapter, verse. Lacking that citation, your statement is unsubstantiated and therefore questionable.