What is the tone of bontemps’ poem "a black man talks of reaping"?

The tone is bitterness felt by the African Americans. 

He was bitter in describing how African Americans felt towards slavery.

There is nothing inherently wrong with being gay. speaking generally, opposition to gays are usually judged on people's moral basis whether it be religion, experience or other factors. to conclude, there is no objective answer to this question only subjective ones that rely on people's idea of what is right and wrong.