I agree with this assessment - Chris found in Bronycon that sense of belonging that he's not had since the day Graduation itself forced him out of that comfort zone.The only reason he's this upset (escalating and repeatedly, obsessed with it really) is that he understand there is no point in going if he's being vocally excluded by the community at large. The fact that it's the last Bronycon only aggravates this. He needs to fix it NOW it he wants to go and he can't despite his efforts.
Except now the very people in that community are shutting him out. No Gal Pals here. Or a school administration that basically nullifies any and all repercussions of the actions Chris does. He's trying the childlike approach of simply asking to be let back into the cool kids club but where that used to work, his reputation precedes him and people know better.