This is essentially the same argument used to justify the racism that models will happily regurgitate if not trained explicitly to not do so. In the end “We hold these truths to be self evident, that all men are created equal” is an axiom that you must elect to believe, not solved backwards from population statistics.
I generally don't see racism "justified" in models but rather explained. And the explanation is always bad training data / gaps in training data. I am suggesting you train/modify it to cover training data deficiencies so you treat all hateful content with equal discretion.
But keep in mind even the approach you recommend carries its own US-centric bias. There are lots of countries that would want open racism against some groups but not others and dismiss your desires for egalitarian treatment as American arrogance.
