Had Wednesday’s massacre of 17 people at a Florida high school been different in one respect — that is, had alleged perpetrator Nikolas Cruz shouted “Allahu akbar” during the course of his rampage — conservatives would be demanding another round of get-tough measures.

Tougher immigration laws. Tougher domestic surveillance. A rollback of Miranda rights for the accused. Possibly even a Muslim registry. Constitutional protections and American ideals, goes the argument, must sometimes yield to urgent public safety concerns.

But Cruz, like Las Vegas’s Stephen Paddock or Newtown’s Adam Lanza and so many other mass murderers before them, is just another killer without a cause. Collectively, their carnages account for some 1,800 deaths and close to 7,000 injuries in the United States since the beginning of 2013, according to The Guardian — though that’s only a small fraction of overall gun-related deaths. And conservatives have next to nothing of use to say about it.

Well, almost nothing. Some conservatives talk about the importance of mental-health interventions with the potentially violent. Florida Gov. Rick Scott wants to keep firearms out of the hands of the mentally ill. The Obama administration tried to do that after the 2012 Sandy Hook massacre by requiring the Social Security Administration to submit the names of severely unwell persons to the F.B.I.