I had a look at one of his Peertube feeds and I see that "soy[noun]" is something he uses often enough that it's probably not a typo. Example: "climate soyence," "OBS is major soyware." All with the soyboy meme guy overlaid. The "soy" thing is very much an alt-right dogwhistle, but those have a way of leaking out, so it's not always a red flag in isolation. I don't think such a charitable read is warranted in this case: he's all in on the meme. Put it together with all the pepes and whatnot, and it's clear he's at least well into the pipeline.

This is why I'm usually against making such accusations without extra context. There's no way a casual reader could have seen this. If you don't have that context, it's clearly just a typo! So Kaze404 looks like a goofball, unless you have context.

edit: more context that removes all doubt https://news.ycombinator.com/item?id=28653868