I'm missing something. Which overtly hostile acts are you referring to? I haven't seen anything that I'd call overtly hostile, but then again, I might have easily missed something. It is perfectly acceptable and reasonable to hold some different ideas from one's parents. But - Ms. Keyes choose a political ideology that is not only diametrically opposed to her parents', but also one that her father has opposed in his public life, and could be argued, based his career upon, and she choose to make those differences public in a way that will embarrass and hurt her parents. Hardly the act of a loving child who values her relationship with her parents and just wants them to talk to her.
Sorry Suzy, that doesn't rise to the definition of overtly hostile in my book. I myself wouldn't have turned my back on my daughter, and that's really all I can accurately say.