https://en.m.wikipedia.org/wiki/FBI–Apple_encryption_dispute
I'm not sure what I'm missing here. The position of the government was pretty clear that "Apple should unlock the phone," until the FBI did it independently.
Personally, I agree with Apple's position. Security requires trust, and Apple showed good reason to trust them, enough that I went out and bought an iPhone.
But I have no idea how Trump agreeing with the courts and the FBI shows some kind of radical new threat.
Perhaps the lesson to draw is that, really, we're all authoritarians in some degree. Some of us want our uncle to stop saying the N-word at the Thanksgiving dinner table, some of us don't identify with our assigned gender and lash out at the opposition with responses of disproportional magnitude, and some of us want to classify people by religion and detain them. America truly is a melting pot.