OK, I'm going to be blatantly politically incorrect here, so nobody get offended.
These idiots are not "enemy agents." They are stupid black criminals who are locked up for committing any number of crimes. They don't know anything about the Koran and probably even less about the Bible. Most of them are functionally illiterate. They are Muslims because they need to be part of a gang behind walls, and that's the one that provides the best protection.
We are talking about thugs here, not terrorists or enemy agents. They don't know the middle east from their middle finger.
There are plenty of reasons to keep them locked up. Religion is not one of them.
These thugs, if and when they get out of prison, aren't going to be bowing to Mecca or studying the Koran. They'll go right back to whatever criminal activity put them behind bars in the first place.
These are not true believers, they are mostly from the ghetto, and they are their own worst enemy.
Throw them into a like detention facility with that other American being held on...what charges? What's his forgettable name?
This country is in a war for it's survival. Sorry for the inconvenience.