one guy out of millions got violent. Why? Because he is a disturbed guy, probably.

If they cheat, we root out the cheaters and expose them.

If they are racist, well, they are racist and we do our level best not to be (with varying degrees of success, because we'er humans and not perfect).

What we don't need to do is excoriate ourselves over one guy out of millions.

We don't need to blame every person who ever supported Sen. Sanders in the primary for this one guy's actions.

We don't need to act as if the Republican rep who got shot is some kind of folk hero. He's a guy who was in a place with a disturbed individual who chose to use a gun to try to kill people.

That is not "our" fault. All we owe them is what they give us: vague statements about hopes and prayers. The difference there, is that almost none of us wants to see people killed. Them? Not so much.