I disagree strongly on this - the weapons are definitely important. They clearly felt the need to bring them - why? They're not hunting or shooting targets. Certainly they knew that there would be a police presence - this isn't out in the woods somewhere. A rifle in a crowd surrounded by cops is emphatically not appropriate for self-defense. They've brought them either for murder, intimidation, or both. If there was any doubt: that's not okay.As for weapons on campus. Meh, that doesn't really garner any attention from me. Mass shootings are kinda passe, its all about bombing soft targets now.
(The campus location has nothing to do with it, assuming that campus doesn't prohibit them.)