Gotta say, I don't think it has anything to do with being Croatian, rather the worship, busts, portraits etc. of certain people at certain clubs.
E.g. this guy:
"German spies who had been established to watch over Pavelić even wrote to German SS leader Heinrich Himmler of the Ustaše’s methods of violence, stating that they were equally torturous to “helpless old people, women, and children.”
Pavelić’s men would reportedly gouge out children’s eyes and hack them to death with shovels. They would hang men upside-down, castrate them, then strangle them or allow them to be mauled by dogs"
It's a shame then that when SU58 have genuine concerns about over-policing that it kinda gets lost with an unsympathetic audience.