I was pleased by your support for Ms. Khan, as she always has positive, intelligent ideas yet generally gets comments from a lot of incredibly nasty, negative trolls.  But why do you write "Muslims?".  The question mark implies you don't think they're saying anything, or at least not enough.  It takes seconds to find widespread condemnation by Muslims of violence by crazy people in the name of Islam.  There is plenty -- maybe it doesn't make for interesting press, though.
Perhaps your point about comments being closed for legal reasons can be addressed by the Globe's Public Editor.  I imagine the standards for articles presenting factual information are quite different from columns expressing opinion.