If the issue is about preferences then what behavior is there to change? He's just supporting his case. Looks to me like the moderators have decided that their preference is "right" and the banned person is wrong, and then go on to abuse their power.
You're better than this - if you are a moderator then learn to ignore these (it won't be the last one you see in life :)).
I'm a NixOS user, and having seen ideologically-charged members (on both sides of the aisle) maliciously edit package manifests, I'm glad these dick-swingers get kicked to the curb. There isn't room for your politics when designing open source software, and if anyone disagrees with that it's their prerogative to fork the software.
If it was my call, I'd go even further. If you're unwilling to put your love of software development before your arbitrary personal opinions, you shouldn't be trusted in the SDLC. It's a petty rabbit hole that ends in people writing overly restrictive CoCs instead of pounding down the offending users with a mallet. Make an example out of them.
AFAIK, srid hasn't "maliciously edited package manifests" as you put it. It's more like the moderators and srid don't agree on some off-topic topic, so the moderators (IMO) abused their power and banned him.
Also, apparently the discussion forum post (or github PR?) has been removed so there doesn't seem to be any good evidence either way. Looking at srid's PRs, mentions, discourse etc, it seems all ok, can't find any of these toxic derailments and what not.
You're better than this - if you are a moderator then learn to ignore these (it won't be the last one you see in life :)).