Oh, I think she means it. I also think her recent public appearances have indicated a fair amount of embarrassment mixed with stubborn old person pride. Both Kimmel and John Goodman roasted her on it and she barely fought back. She even urged people to vote him out if they wanted. I think/hope the reunited cast and crew have had an effect on her.
And yes, I do think it was borne out of a frustration with 'political correctness' with her - and too many other people like her, who the right radicalized from the far left when their privilege was threatened. Some can be won back, some can't. No amount of political correctness can excuse her vote or her behavior, but it is a trend we see again and again. Alienation in a changing world makes some people easy pickings when they can't adjust.