I agree she's a total cunt, but I think Perez is just as big a cunt. The difference with him is he is a man-child, so he doesn't have the intellectual maturity to be on Katie's level. He is 8 year old Katie, looking for raw attention more than measured fame/notoriety.
Katie is a consistently evil adult whose motivations can be understood at the same time they are reviled. Perez bounces around the moral compass, living from justification to justification to suit whatever moment he's in. He changes gears to project "being right" in any given moment. Whoever raised him didn't really raise him.