The thing is, anyone with a strong identity to the show is more than free to give their generic "nuuuuh not lil' stevennn!" response; it's fair, if a little predictable, and isn't extended to just SU exclusively. The people who take it as a personal affront and rationalize excessive counter response such as making a scene, harassment, stalking, doxxing, etc,. are the select vile few who manage to ruin absolutely everything for everybody. These people have a bloated enough ego and thin-enough moral fiber to take it upon themselves to undergo some personal crusade against another person all because they drew a few pictures they don't agree with. It used to be one thing where these people were only locked to the cesspit formerly known as Tumblr, but nowadays these psychos are everywhere, and the worst part is they've moved on from cartoons to politics. Steven Universe was a very unfortunate victim of its time, however, it still managed to be a great success even riding alongside the likes of other major modern cartoons. Anyway, I've only seen one person throw a major fit over any Kaiju Steven and it was on one of PuffDaga's pics, which said fit-thrower has since hidden from public view.
Porn, and good porn at that, is something to be respected among a community. Not suppressed and assaulted.