Seems to me that anyone who cannot see that radical islam motivated the shooter, anyone who gropes at mental illness or gun availability as the cause, is demonstrating a form of mental illness themselves. It's clear to me that those on the terrorist watch list should be denied the ability to purchase guns, but its equally clear that muslim terrorism is the major threat to life as we know it in non-muslim countries.  Read the koran passages that call for elimination of infidels.