Definition: In this task, you are given a public comment from online platforms. You are expected to classify the comment into two classes: insult and non-insult. Insult is any lanugage or act that is disrespectful or scornfully abusive.
Input: Comment: Millions of slaves and you come up with a just a few examples before the War.

This thread concerns the era c. 1861 -65 FYI.

Moreover, during this era many people, white & black, regarded as being criminal got hanged; very, very few of them were black, partly because each black was worth the price of a good racehorse.

It requires just a smidgeon of common sense to see that blacks were, for the most part, well-treated because their owner's livelihood depended upon their good health. Just as a horse could not work well if he were weak or sick neither could a black or a white -- e.g. indentured servants.

Yet again you ignore the fact that on plantations and large farms, blacks and whites grew up together. Most white owners felt a sense of moral obligation as well to treat their slaves well and to teach them to read the Bible.

Your "Uncle Tom's Cabin" recitation of Southern life bears has little to do with reality.
Output:
Non-insult