The adversarial system is the best we've come with in law and government. It seems, relying on opponents to keep each other honest, is a tool worth using.
"Moral" is a problematic word with religious baggage. If you exclude the words "right", "wrong", and "ethical" from the debate, you make things easier as well.
If you simply use the word "strategy" instead, most heated arguments vanish. Yes, there are foundational social strategies that exist in every successful human culture. It's pretty easy to account for why that is the case, and no reason to oppose the idea that such commonalities exist. And looking at the other side of the argument, "strategic relativism" isn't that inflammatory either, of course you'll find unique and situationally inspired strategies too.
Not the OP, but I feel the racially focused initiatives of today are misdirected, counterproductive, and themselves racist. And like you, I deem it as not in my best interest, or society at large, to endorse or support those who are doing the wrong thing (even if they are doing so with the best of intentions).