I think generally speaking game specific communities are toxic.
I wouldn't necessarily say that. What I would say is that online communities have a tendency to bias towards toxic without heavy-handed moderation.
The simple fact is that people who aren't toxic don't want to be around people who are. So if there aren't moderators keeping out the toxic people (or at least, stamping out the attitude specifically) then after a while the only people left in the community with be the toxic ones.