Angry; Sarcastic

Slavery makes Douglass angry, and you won't like him when he's angry—that is, unless you enjoy a good burn fairly given, which of course, we do. Overall, the tone here is one of angry sarcasm, which yes, we just made up.

Check how he uses the rhetoric of Christianity against these prejudiced church peeps:

Now it so happened that next to her sat a young lady who had been converted at the same time, baptized in the same water, and put her trust in the same blessed Saviour; yet when the cup containing the precious blood which had been shed for all, came to her, she rose in disdain, and walked out of the church. Such was the religion she had experienced! (12-13)

Then watch as Douglass calls out people who say some of their best friends are black:

Yet people in general will say they like colored men as well as any other, but in their proper place! They assign us that place; they don't let us do it for ourselves, nor will they allow us a voice in the decision. They will not allow that we have a head to think, and a heart to feel, and a soul to aspire. They treat us not as men, but as dogs—they cry "Stu-boy!" and expect us to run and do their bidding. That's the way we are liked. (24-28)

With friends like those…