I’m sure he was a good father to you since you miss his old self, but being a cop in no way implies that he’d be intelligent or competent in any way. In fact, it would provide some of the explanation as to why he’d be joining the cult of an authoritarian figure. Not only are cops often required to not be too intelligent, they also already belong to an authoritarian organization, so it wouldn’t be a big change to jump on the Trump train. It’s not exactly a coincidence that he has such strong support among law enforcement people.
Again, I know that people can be good fathers regardless of their professional lives, and I don’t doubt that he was good to you. I’m not looking to be offensive or attack you, I have nothing at all against you personally. It’s just slightly jarring to see someone’s status as a former cop being held up as evidence of competence. It is not now, nor has it ever been a good thing to be a cop.