> “There’s roughly 100 firefighter arsonists convicted every year in North America and all of them are serial arsonists, which means three or more fires,”

OK, so why should I care? A brief Google shows the population of North America at ~600 million people. And the number of firefighters in North America at ~1.3 million. So your likelihood of being victimized by a serial firefighter arsonist is about the same as being struck by lightning, dying in a plane crash, or being killed by a falling coconut.