I'm sure those colleges will regret their actions if one of these "students" detonates in the Student Union at the height of the school day. If that happens, I'm sure they will find a way to blame it on: a gas leak, a reaction to anti-Arab descrimination, or even anger at the Israeli occupation--anything but terrorism.
My alma mater (UNC) had one decide to show his gratitude to Allah by running people over in a rented Jeep.