Why is the Gmod community SO TOXIC?

I guess because it's a mix of other communities that came here to customize maps and use (insert original game here)'s SWEPs and playermodels to have fun. Then they discovered similar servers. Basically, like 70%-80% of playerbases I know are just 'minges' (I know you all Gmoders out there came up to this term at one point). It's said, but true.