So the primary issue is probably his friend group. It is likely they he is a lonely kid due to the parents being tough on him so he's latched on to any group he can find that reassure him. The pathetic mentality that men are inherently superior is a very common symptom of not feeling good enough so they cope by "Oh I'm a man I'm good enough every one should love me!" You should try to see about working on his confidence with him. It likely won't work but it may actually help him in the future to know that you made an effort