He is of course entitled to feel and think whatever he wants, but maybe a little old-fashioned advice would help here: measure twice, cut once. He clearly didn't think through the effects of posting a stern essay to a company-wide board on a subject that is really quite touchy in the midst of one of the more socially-turbulent periods in the past 20 years.
If he wants to prove it's that desperate, he probably should have worked harder on his essay or social skills, and found a better way to introduce discussion.
And we haven't even confronted his perceptions yet. I have to wonder who exactly feels afraid and intimidated by the conditions. Him, and who else? Instead of resigning to anxiety that he might be confronted for such a strongly-pointed diatribe, maybe he should have considered that his understanding of the situation might be skewed?
I can't speak for anybody else, but his facts didn't support his conclusions for me. His timing was even worse. If it's a discussion he wanted, then maybe he should have researched tact first.