When you say these things are racist, the people on the left will reject that based on their belief that white people can not experience racism. For them racism is prejudice + power, and they see whites as the oppressors and non-whites as the oppressed. So calling anti-white sentiments racist will always run into a pointless debate about how it isn't actually racist.
Just realize that the game is rigged. These people have been manipulated into believing that their own race is evil. You can't talk reasonably with them. It is no different than arguing with a religious person that has been indoctrinated since birth. You can't even hate these people. They are just parroting what society has told them since they were kids.