Really? Tell us more. Like, what is the profile of your typical arsonist?
There really isn't one, as the motives for arson are across the board. Revenge, fraud, to cover up other crimes, mental illness induced pyromania, sometimes for the sheer thrill of it, etc. Some of the more sophisticated serial arsonists may occasionally have a LEO or FD background. One particularly fascinating case is that of the serial arsonist John Leonard Orr.