It is unfortunate that we have a couple of people around us that resemble the mindset of a baboon. There are certain people in life that inwardly feel rejected, and take that anger out on others - it's called displacement. It's the guys in high school that the women never notice, so they get bitter. The jocks beat them up and laugh at them. The "cool crowd" uses them as the butt of all their jokes. Since nobody likes them, they in return hate the world. It's their little way of getting back for the hurting and lonliness they inwardly feel. Rather than continuously try to berate them, maybe just feel pity for them.
Lil' Jenn, by the way, get used to stardom, it's this way for all of them. Consider what actual stars go through.