As it stands now, the meme of the Sonic fandom being a warzone is quite true. There's the Archie/SatAM side, who are determined to uncover the truth behind the corperate culture within Sega, and discover of the infamous Sega mandates are real, as Flynn claims.
Then, there are the IDW/Flynn crowd, who have an elitist view towards anything that isn't the curremt Sonic project, or anything not made by Ian Flynn, to the point of sperging out like you saw earlier. After years of their enemies trying to uncover the truth, they've done everything in their power, from gaslighting, to the aformentioned death threats against anyone wanting to look into things. They are THAT determined to maintain the status quo, even if doing so kicks everyone else out of the fandom despite being there first.