There isn't one, but that's not the point. Bulleyes, gun sights, are all the same shit. It's disingenous to pretend it isn't.
Political rhetoric is out of hand, but it's not why this kid did this. Mental illness is.
The fact that we will completely ignore that to line up partisanly and throw rocks from one side to the other is exactly what the people at the top want. Divide and conquer. It's worked for thousands of years to keep them at the top and everyone else at the bottom.