From a Jack Shafer Fourth Estate column on politico.com headlined “Why Trump Did It”:

Remember those guys in high school — it was almost always boys — who got a buzz from smashing windows, or sending firecrackers down flushing toilets, or throwing rocks at dogs and cats, and shoplifting for the pure rush of it? They didn’t have a reason for their vandalism or malice, they just lacked the “impulse control,” as the school shrinks liked to say, to inhibit whatever imagined mayhem or destructive mischief popped into their brain.