Legal maturity is one thing, and brain maturity another.
Nick's a child, and an obvious child at it. No need to fret about it, it's quite common these days, pampered mommy's boy, no father figure to tell him to do something serious and to quit being retarded, no relationships with opposite sex, no (team) sports playing (very important for young males).
He's a lucky autist that made it because out there a bunch of even more severely autistic males without any roots or guidance exist on the margins of society, lost and fragile.
It's enough to see how many of these "right wing" people desperately want a Caesar or dictator, which no sane actual man wants, all real men are the only leader they will ever desire.
They need dad.