Don't take it too hard.
This sort of thing is bound to happen.
Just calmly think up your reply for the next time somebody offersthis shootingas a reason deny self-defense to college students.
Students hurt and kill each other occasionally without firearms, too.
There is no reason thousands of students should be unable to protect themselves just because a very small thimble-full mis-use firearms.
It would be like erasing freedom of the press because communists print manifesto's. Heh, heh, heh. If you're sharp, you could spot the political leaning of your antagonist and insert the appropriate counter-personality: ...erasing freedom of the press just because Rush Limbaugh is an idiot. Or, ...erasing freedom of the press just because Michael Moore is an idiot.
What's the count within the last 18 months? 55 dead or wounded at VA Tech? What was the count at the other university? Got a long way to go before the damage by idiots and so forth out-weighs the carnage that could be prevented.