Communities y'all had the wrong impression about

I felt quirky today and decided to stalk a certain website that allegedly kills people with their toxic ass community, only to see there being a bunch of game forums and the whole community playing together, and people just being supportive to each other over all. They just have a certain opinion over a controversial topic (which I will not be mentioning cuz ion wanna bring it up) that majority of the public doesn't agree with. So that made me curious, what communities did u have the wrong impression of and were surprised to see how they actually were?