Do you have a justification for that claim that isn't along the lines of "our cause is just and is worth fighting for/debating. Their cause is unjust and is just 'culture war' issues meant to distract"?
It's trivial to reword this for "the state of moral values", eg. "we are currently in a place of degrading moral values, and anyone advocating that moving away from that place is bad, happens to be advocating for degrading moral values indirectly". In other words, both "racism" and "the state of moral values" are culture war topics, and I don't how you can justify privileging one without having to invoke your own political beliefs.