Sword of Spirit
Legend
Usually, the arguments ensure because of the more common fan issues that we see in anything from Star Wars to Forgotten Realms; canon and validation. People strongly identify with D&D, people love D&D, and because of that love for D&D (and/or particular things within it) they have strong beliefs as to what should be included. Or even what a campaign setting should look like.
One important factor that I think you may be losing inside your categories of canon and validation is shared experience. That’s pretty much why that stuff matters to a lot of people. Contrary to what might be assumed, rather than being a belligerent gate-keeping attitude, it can actually be about wanting to bring people in and finding it no longer a simple proposition.
Nobody wants to start up a conversation about D&D/Star Wars/Star Trek/Etc, and have to stop and ask, “Wait a minute, which D&D/Star Wars/Star Trek/Etc, are we talking about?”
It isn’t about wanting to be better than others, it’s (sometimes literally) wanting to be on the same page as others. Sure it can get ugly, but the root drive is an inherent desire for socialization. And the problems arise when this was once easy and assumed, and then some corporate entity changes the identity of a product so that instant connection you used to be able make with complete strangers isn’t possible anymore. I mean, I’m sure some people just want to be jerks, but I don’t intentionally associate with them, and the friends I have that are passionate about things like canon generally want to be inclusive and bring new people into a hobby.
The world of fandom would probably be a better and more civil place if corporations would just avoid reusing the same name for a revised product.
“Yeah, I’ve heard of this Dungeons & Giants game, but I haven’t played before. Sure, I’ll join your group and give it a try. I do play another similar game by the same company called Dungeons & Dragons I could run sometime later if you guys are interested.”