Yes, this is true. Marginalized communities can get away with blanket statements and general biggotry because no one calls them out on it. If anyone does, they are denounced on the social platform as racist/sexist/___phobic by the community in question and its supporters. However, members of socially privilleged groups (whites, males, normal people) are not allowed to do so because of their social privelege. This is just and indisputable.