I think, she has a very small set of sincerely held beliefs, one of them being that the US should completely disengage from all foreign entanglements.

I think that she tried to seek opportunities to gain influence and power in the Democratic Party to enforce those goals, she was disillusioned and saw no route for her self there, so she pivoted to maga because it looked easier to advance to a position of power within. She was willing to say and do anything to get that position where she could pursue her deeply held belief, and she got there, and found that by the very nature of the easy power, she had completely given up any autonomy to act upon her beliefs.

Now, it’s pretty clear that this is not the beginning of a political movement she can harness, but the death of one that used her, she’s stepping away to not be associated with the worse to come. Maybe she’ll be able to salvage a career of some sort, but really, the best she can hope for is not be noted in history text books as a key player in the clusterfuck coming.