Look I'm not saying there aren't some extreme Sony fanboys in here like you're saying. But you're also completely ignoring how this place got flooded with Xbox fans after the mods lifted all the thread bans. Some of those fans joined the discussion in a good way but a lot came in and trolled the ps5 and spread concern. And now they've all disappeared like the avatar.
I watch sports. I support my team (for whatever sport) to a pretty high degree. When my team beats a rival, the fans take that to the other team's fans like villagers with pitchforks and torches going after a monster. When the rival beats out team down, we get defensive. It's pretty normal in that context. In fact, most fans are pretty protective of their team to the point where when something bad is shown, either it wasn't that way, or it wasn't that bad. I see a lot of this in the passion of gaming fans.
If you can love multiple teams of a sport, you're likely to be a bit more able to be a bit less one-sided in your support of things as a fan of the game. Here, in gaming, that would be the people who buy multiple platforms and say they love gaming as a whole regardless of which system people are talking about. Again, I see perfect parallels to what I read here. Very normal stuff.
If it is acceptable for sports, why wouldn't it be acceptable here. I think it's the view of the situation. Fans are fans. Some are rabid, some toxic, some rational, some supportive. That's what it is to have a forum. The main differentiate here would be that there are rules for this forum. People need to respect them to be a part of the community. Nothing wrong with a good ribbing, but there are definitely lines which shouldn't be crossed is all.