Had an acquaintance who was a manager at a local warehouse type grocery store in the near “hood” about every 3 weeks or so, some dingus would come running in, run up the papER goods aisle squirting lighter fluid, light it and run out. Never got to huge blaze status, because they would grab fire extinguishers and put it out, but man what a mess. Some people.
Most arson's are committed by psycho-sexual deviants,
They get sexual arousal from the noise, alarms, cries of "fire", fire truck horns and sirens, etc.
Statistically, they have the highest relativistic rates of all offenders ; they will continue, until caught .