I don't think people like this can "change their tune." They just find a new cause and a new target to blow up.
The justification of violence as a means of negotiation pretty much voids any expectance of a sanely rationalized decision.
Maybe next week, her paperboy will toss the paper on the lawn, and she'll beat him up as a way to convince him to toss in on her steps next time. Or she'll be at the grocery store and someone will bump into her and she'll tip their cart over and beat them with a can of green beans...
We're not talking about someone that was pressured into holding a door open for a couple of terrorists one night, and ended up getting linked to them and going to jail... We're talking about someone who masterminded a nation-wide campaign of repeated acts of violence and terror - all in the name of getting her way.
People like that don't have the mental capacity for recognizing change and rationalizing new approaches.
...imo, of course.