Um, car bomb? Yet, no "link to terrorism"? Yeah, sure.
Maybe he had a problem with his mother-in-law, could not get hold of an assault rifle, and decided it was easier to blow up the 'church' she attended?
Because that's terrorism right?
In fact, from reports I have read, that seems to be pretty much it. He's a Sikh and had a falling out with his parents, presumably also Sikhs. So no "terrorism", no "wanting to murder infidels for their religion", just common or garden grudge, seeking to blow up their car, seemingly with them in it. Hate towards his parents getting out of control.
Take your anti-Muslim bigotry elsewhere.