Would such people blink at mass murder anywhere? Would the shooting in Las Vegas be a problem? Parkland? Of course not. I have no more knowledge of what really DID happen than most, but stating that these things are possible seems an obviously reasonable claim.
It is important to remember that much of the Left in America is of the Sybaritic type: they want to deny the reality of evil. Their lives consist in elaborate fantasies based on the idea that the people MOST amenable to reason and restraint–Conservatives–are in fact the WORST people in the world, and the main or even exclusive cause of all it’s suffering. All they have to do, in this make believe world, is hate us and marginalize us, and everything else will fall in place. There is no other evil. There is no other greed, no other source of violence.
Emotionally, they are children. They are not idealists but idiots. Idealists look at the world as it is, and see what could be. I am an idealist. Imbeciles look at the world and see what they want to see.
And the thing is, when you are emotionally unwilling to see evil, to feel it in you, too, then it can easily grow within you, unnoticed, unchecked. This is how the viciousness we see everywhere today happened. It is also how they are so blind they think that–with a hundred million dead bodies they must claim responsibility for–they are the good ones.