And, yeah, I'm with your second paragraph. I think much of the country thinks that illegal immigration is a problem, and also thinks that Trump's enforcement of it has been unreasonably brutal and cruel. And a bunch of them think that trans people don't belong on womens' sports teams and that kids shouldn't transition, and also think that trans people don't deserve to be beaten and killed for being trans. And a bunch of them think that wealth inequality is a real problem, and also are deeply skeptical of the proposed solutions. And so on.
Many people are not really sold on the entirety of either party's platform. Unfortunately, all they get to do is vote every two years. One bit of feedback every two years. So Trump thinks he's got a mandate for everything he wants to do, but what he really has is a vote that the country wasn't happy with the way things were going under Biden.
(Now, true, there are also lots of people who are completely bought in to one side or the other. But since such people tend to be more vocal than the not-really-sold-on-either-side types, it makes it easy to overestimate how many people are zealots.