I've been thinking back to the incident on Tumblr last year, when SJWs caused an artist who had done nothing to commit suicide. It raised the question: is Steven Universe a Social Justice show? I don't think so, despite it attracting a very SJW crowd. Whereas Social Justice and SJWs are in-your-face and obnoxious and extreme about their views, SU is much more subtle and not extreme at all. It's lighthearted on the surface, but becomes more complex as the show goes on.
I think the creator of the show is a low-key sjw. She hires minorities almost always, and she tackles her "issues" in episodes but some people taken it to the extreme. Like, Jasper is the patriarchy kind of stuff.
As for the person who committed suicide why. I mean, yes they were bullied by tumblr but seriously? Everyone in that scenario has something to be ashamed of.
As for the true values of the show, I think it's about blissful idiocy. That's what Steven is. He's a happy idiot living in a dangerous world and has no idea what's going on. Steven gets to think, cool a new magic thing, while everyone else can think, holy shit Imma die. The episode full disclosure sums it up pretty well.
Oh, I think this show is very much a social justice show. Do I mind? Eh. I mean, it does bother me that we so far have no lore explanation as to why all gems only represent females and go by female pronouns and sound like females despite them being genderless beings, and why almost all the heroes in the show are only female besides Steven (even the watermelon people send females to war while men stay home, which was really uncomfortable for me since that message was pretty obvious) But otherwise it doesn't bother me as much as it should. I love Steven Universe to death.
I am not sure of the context of this situation you mentioned above so I'm just talking about the show itself.
"We all want progress, but if you're on the wrong road, progress means doing an about-turn and walking back to the right road; in that case, the man who turns back soonest is the most progressive." ~CS Lewis