The Onion

The satire is the fact that The Onion has a "form letter" for school shootings. The just change the names and numbers, but otherwise the article is exactly the same.

The satire is that this highlights the gruesome regularity that school shootings occur in America.

BTW satire is not always supposed to be funny. In my opinion the best satire is not funny.

It's so real, it's wrapped around to becoming ironic.

I don't know!