This!

Just like you cannot hold a conversation, of any meaning, about advanced mathematics, with a five year old, it’s equally impossible to hold a conversation, of any depth, with someone who is still in the remedial class on racism. They need to school themselves and catch up. If they’re still at the “asking you to define racism” level, it’s not worth talking to them!

Getting someone like that up to my level, with them fighting every single step of the way, costs too much time and energy.