I'm honestly not sure what the heck is going on. Clownfish had a couple of videos on the matter, but they don't get into what started this or the why:
The second one though, GenCon has preemptively banned the new TSR from being allowed to come.
So yeah, this entire thing is a confusing mess, but it looks like it's about TSR deciding to focus on retro style RPGs rather than more modern ones and mainly focusing their marketing on the older crowd of tabletop gamers whom are seen as... less politically correct?
Yeah, I'm confused.
People apparently are digging into the names of everyone related to this TSR and found a problematic tweet issued by one of their social media accounts responding negatively to a Trans Activist trying to provoke them, found Gygax Jr make a problematic joke in a podcast with about a thousand views a few months ago and has some sort of issue with his brother regarding TSR and found another member of TSR ran for Republican office among other random things. Plus all of the original problematic statements that Gary Gygax made, plus bringing up random trademark disputes and the like as well. Basically doing a deep dive and reposting and regurgitating things hoping to find more fuel to keep the brigading going.