Just regular normie logic. They hate rejects. Society hates rejects. They reject people, and then blame them for being rejected. They decide that they play zero part in rejects being rejects, despite the fact that they're the ones rejecting them when most of the time they don't even know the person. Normies are governed by the social status quo. They hate it being rocked.
A secondary reason for this though, especially low tier normie men. They see themselves in us. They know they're a fucking knives edge away from being completely outcast themselves. They live on the edge of that possibility and it scares them. So they lash out at us, as the manifestation of a possible version of themselves where they've got zero acceptance from society. One that could very well catch up to them in the coming years.
It enables them to deny the possible reality they may or may not face, and in the process they try to claw back some social capital by showcasing to normies, "see i'm not like them, i hate them as much as you guys do. I belittled them the same way so i'm still cool right?"