You shouldn't hate someone because of their political beliefs.
Kerry has just been introduced to her cousin's new boyfriend Frank, who is wearing clothing indicating support for a political party that Kerry is opposed to.
Kerry wants to form a first impression of Frank.
Kerry considers that Frank might still be a good person even though they disagree politically and gives him the benefit of the doubt.
Kerry decides that Frank must be a horrible human being and that she hates him.
Kerry tries to get to know Frank a little bit better so that she can try to understand his political perspective.
Kerry acts very coldly towards Frank all afternoon, avoiding him as much as possible.