My impression is that the nsacpi of five years ago wouldn't recognize the nsacpi of today. Everyone experiences some ideological change over time, but the amount that you seem to have gone through over the past few years seems well outside the norm. Do you wonder just how firm your convictions were, if one person has been able to turn them on their head?
Has there been a specific piece of legislation or policy that has done you or your family personal harm? Detesting the man or his behavior is understandable. Allowing that to twist your entire ideological identity is representative of an emotional immaturity that I don't think fits you.
I'm a centrist by nature. And react against the craziness around me. I went to a college where all the students were very liberal. And was happy to carry the conservative banner in that environment. I worked on Wall Street for 15 years and was repelled by the greed and selfishness. But I'm not sure I changed from the kid who liked to argue with my liberal college classmates. Then I lived in Berkeley for a while and thought everyone there was nuts. Did I become more conservative during this period. It kind of felt like it, but I think mostly I stayed true to my beliefs in a very left-wing environment.
With respect to very poorly chosen one, I could care less about his ideology. My opposition to him would be the same if he came from the left. Having someone so corrupt, incompetent, criminal, delusional, dishonest, unstable, childish, and dumb in high office is a very dangerous thing for any society. And having a cultish group of followers for that kind of person is even more disturbing. I have developed quite a bit of distrust (understatement) for his core supporters who now appear to make up the majority of the GOP. This makes me think I'm unlikely to consider being part of a coalition with them anytime soon.
Specifically with respect to abortion, my position there has changed very little over the past 30 years. If anything I'm a bit more inclined to favor legislation that restricts abortions at earlier points of pregnancy. My position has never been one that could be described as pro choice or pro life.
Oh one more thing. When I changed my registration in 2016, it was from Republican to independent. I changed it to Democrat in 2019 because in our system to have a full voice as a voter you have to choose. And I wanted to use my vote to support Amy Klobuchar in the primary (with credibly accused creepy joe being my second choice). I'm very happy with how things have played out on the Democratic side. I probably would have voted for Sanders or Warren against very poorly chosen one, but it would not have been a happy vote.