This really isn’t that surprising. The Republican party has become a cult of personality around Trump, putting it at odds with actual, ideological conservatives.
I don’t know what Trump’s ideology is, or if he even has one. He seems to only believe in his own ambition, for wealth, power, and control.
However, conservativism does lend itself to people like Trump rising to power, because it promotes a central authority and/or aristocracy that preserves tradition, culture, and the established social order. Conservatism doesn’t just tolerate social hierarchies, like class, it promotes them, and, in fact conservatism believes that such hierarchies are not only necessary, but natural and essential. It makes sense that malignant narcissists would take advantage of such a system to try and take their “rightful place” at the top of the hierarchies, because they believe that they are inherently superior to everyone else.
Do you mean the Democrats? If so, yeah, the Democrats do seem willing to accept anti-Trump conservatives into their party.
The Democrats really want to be a big tent party. They’ll take just about anyone within a certain ideological range, centered around the American political middle. This definitely includes many conservatives.
I question the effectiveness of this strategy, though, as when you include too many opposing ideologies in a single party, it can be difficult for the party to choose a clear path to take. It’s often the case that when you try to appeal to as many different people as possible, you end up not appealing to very many people at all.