Roger Simon, the co-founder of PJ Media and author of the newly-launched Substack “American Refugees,” said the noticeable common factor among a majority of mass shooters is that the perpetrators are simply “crazy.”

“In every case of these kinds of shootings, one of the things that is always amusing to me is that you get a report that police are looking for the motivation. The motivation is they’re crazy,” Simon said on Friday’s edition of The Michael Patrick Leahy Show.