We obviously have completely different expectations for what is an "appropriate location". I've been to a number of carry rallies, 3-gun matches, Zombie shoots, etc where the attendees are better armed than most 3rd World dictatorships.
I've rarely felt safer.
Don't buy into the stupidity of the Left's hoplophobia.
The solution to random shooters, and even sudden Jihad syndrome, is for more people to carry. Open, concealed, pistol, or rifle. Whatever your personal choice is.
The Israelis figured this out. The Founders figured this out. Heck, even the Swiss figured this out.
Why is it so hard for you?
It's difficult for me because I am a rational adult who understands that with rights come responsibilities. Just because you are lawfully able to do something doesn't excuse you from questioning whether or not it is the right thing to do under the circumstances at hand. This kid did what he did in order to shock people, and that's why he had the note in his pocket--he fully expected something to happen to him because he knew how provocative his actions were going to be. He has accomplished nothing but to further inflame the anti 2A crowd with his irresponsible behavior. I also understand that our threat level is not even remotely close to that faced by the good people of Israel. It's just not even comparable. I'm curious. What is the practical purpose, beyond pulling a provocative political stunt, for an American to take a rifle into a grocery store in the middle of a city? No, It is not "self defense"...even Detroit is not that bad.