People are typically not concerned about "diversity of thought" when it comes to fiscal policy or foreign policy. They're concerned about the things that they'll get in trouble for saying. You know what that is.
Almost invariably, they face backlash for opinions on gay marriage, trans issues, immigrants, and race or gender discrimination.
Do you think criticism of Damore would have been as fervent if he circulated a memo calling for deregulation and tax cuts?
Don’t muddle the waters by mixing up opposition to conservative economic or foreign policy with opposition to racial and gender equality and tolerance of LGBTQ.
Identity politics sets people afire far more than abstract economics for precisely the reason that it is personal and often something that’s a fact of your birth or upbringing which is not a choice.
There are serious black conservatives. Tim Scott, for instance. Michael Steele. Crystal Wright, maybe. Find one of them being called a "white nationalist", rather than trying to read tea leaves out of the reactions to an Internet troll.