What gets you about what happened in San Bernardino is the shattering sameness of it. Once and not so long ago such atrocities, whatever their cause, whether the work of schizophrenics or jihadists, constituted a signal and exceptional moment. Now they’re more like this week’s shooting. We are not becoming blasé but increasingly inured. And, of course, armed up.

You can see a coarsening in how we respond and react on social media. No one feels ashamed to exploit the tragedy for political purposes even while it is happening.

We are all free to say what we think, and must be, for without this freedom we will no longer be America. More on that below. But you always hope what is said will be constructive, helpful, maybe even at some point heartening. You have a responsibility as an adult to do your best in this area.

But as soon as the story broke Wednesday afternoon, and while it was still going on, there were accusations and bitter words flung all over the Internet. The weirdest argument came almost immediately. A person named Chris Murphy, who is a U.S. senator representing Connecticut, sent out what struck me as the most manipulative message of recent political history.

The background is that Republican presidential contestants responded online to the shootings with the only helpful thing you can say—or do, frankly, from faraway—when a story like this occurs. “Praying for the victims, their families & the San Bernardino first responders,” said Jeb Bush. Mike Huckabee said he was “praying.” John Kasich: “My thoughts & prayers go out to those impacted.”