Idk if you see @OpenStars' comment, but he provided a link to the summary from blahaj.zone's perspective. It does mention an incident with c/196, but it's not the whole picture.

In short, users from Blahaj.Zone (as well as other Lemmy instances) were complaining about Hexbear users' obnoxious behavior, "Hexbear users calling people “libs” as an insult, denying crimes of Russia and China, denying the crimes of Stalin."
Users started asking to defederate from Hexbear and admin of Blahaj.Zone opened a thread to talk about it, which Hexbear users attacked and spammed the thread with images. Then, Hexbear user complained about c/196, that their comments were being removed, "comments that called out the use of the r-word and other call-outs". At which point, Hexbear preemptively defederated from Blahaj, mostly citing the incident above.

I linked the whole thing, so you can see the details for yourself. But at the end of the day, I would say that the incident started with Hexbear users being Hexbear users.

But also, what are "chasers"?