This is a site where people around the world of different religions, races, genders, traits, etc. connect with each other through a common topic. So it's no surprise that the people you meet here have good or bad attitudes, the staff members can't do anything to prevent them from even touching the site, but you may report them to the staff members or just block them so you can't see their posts.
More info here: https://support.chess.com/customer/en/portal/articles/1444877-what-should-i-do-if-another-member-is-rude-or-abusive-
Why are people so rude here?