You just argue that people shouldn't acknowledge it because doing so would lead to policies you think would be immoral.
I'm just not sure that this anti-truth stance is tenable or really worth it. What if we can acknowledge the facts and then... handle them in a non-evil way?
Or perhaps even use that knowledge to head off terrible outcomes that might otherwise happen? E.g. Lebanon-style ethnic civil wars.
I generally think that knowing the truth is useful and equips you to do good things. You just need a non-childish moral system to integrate it (too easy to feel moral if you just wish away the hard facts of the universe).