Of course you can, nobody is claiming otherwise. Freedom of speech does not come with freedom from the consequences of what you say.

I have the freedom to scream "FIRE" in a crowded building when there really isn't a fire, does this mean I should be excused from the consequences? DHH has the freedom to post racist and intentionally divisive BS on his own site, and we have the freedom to let people who care about being anti-racist know to stay away from him and his work.