The first thing necessary in any debate is to define the terms. When you and your opponent have different definitions for the same terms you will end up debating two different things. Upon trying to define terms with these lunatics it will quickly become apparent how completely detached from reality they are, and how unwilling they are to let even the tiniest shred of rationality invade their bubble. They define "systemic racism" in such a way that all differences in any measure of human achievement that have even a slight correlation with race are proof of racism. Their entire belief system is predicated on the unproven assertion that there are no measurable differences between races, ethnicities, or genders that can be attributed to biology. This comes from their fundamental belief that all people are born with precisely the same capabilities and potential, and that all differences that manifest later in life are due to nothing else but environment. In fact, you will find this demonstrably false belief guides most of their bizarre worldviews. When you're debating them and you say "systemic racism" isn't real, they hear "all races, ethnicities, and genders score precisely the same on achievement tests, they are accepted to colleges and universities in identical proportions, they are promoted at precisely the same rates, they earn precisely the same pay, and they are arrested in equal proportions." No wonder they act like you've lost your mind. You have to understand their thinking. The belief that all humans are born with precisely equal capabilities and potential is the bottom Jenga block in their whole belief system. That's where any successful effort to demolish their world view has to be focused.