Look, Pixar might in fact be trying to push a gay agenda, I don’t know. If they are, they’re certainly not announcing it.
As far as Ariel, here’s the problem: Aside from it originally being a Danish fairy tale, and how even the animated Disney version implies that it was located around Scandinavia due to Eric’s Flowerhaven remark, there’s the simple fact that it’s impossible for Ariel to have even a slight tan due to spending most of her life up to the time of the film underwater, having small instances of surfacing at best, let alone fully dark skin. It would make absolutely no sense to have her be black. Especially not when Scuttle’s entire species was changed from a Seagull to a Diving Bird to give him, or her in this case thanks to changing his gender, more scenes with them underwater which effectively implies that Ariel’s going to spend even LESS time at the surface than before. I’m not going to bother talking about Life of Jesus since theater’s its own issue. It also doesn’t help that the situation with Ariel reeks of the kind of SJW elements that plagued Hamilton (unsurprising, due to Lin Manuel Miranda not only helming both productions, but in the case of Hamilton barred whites from playing any role in the play).
As for the story of Jesus to which I referred, this wasn't some lefty off-Broadway hootenanny. It was at Sight & Sound Studios. Again, whether or not St. John the Apostle was black or not isn't spelled out in Scripture and it isn't germane to the story of Salvation. For me, it is telling that there aren't protests in Lancaster.