That is it in one sense, but here's another way to see it. It's their norm that all offensive insults are fair game and that anyone worthy takes those insults a certain way. It is that way in any trash talking group. They train each other to take it and let it roll off. Anyone who can't take it, that person gets laughed at. You don't even have to "mean" the insults. It doesn't matter what they are, just that the person be taught to be inured to what other people would find intolerable or painful. Complaining or showing that it affects you invites escalation. Abuse (verbal in this case, but in others physical) is training, to help you grow up. In fact, how to be a man.

Our cultural norm is a lot different and completely denies that model. Ours is that we spend a lot of time trying to achieve intersubjectivity and feel the pain other people feel so we can avoid hurting them. Showing how something affected you is part of witnessing or testimony or coming out or subjectivity, personal stories, speaking from personal as political. And in our norm laughing at someone is grounds for ostracism or exile or some other escalating intervention.

So yeah, nuclear meltdown culture clash. Racism and misogyny and any way of othering people are its tools. Or, you can see that culture as the tool to perpetuate & enforce racism and misogyny. If you look at how torturers are trained you will see it is the same.