Reading comprehension. Learn it. You've read a basic statement and put a meaning to it so you can fight someone on the internet. Never said anything about how equal the atrocities were.

No, it's an acknowledgement that pointing out random countries and saying that they committed atrocities with implication of exclusivity is both false and meaningless. For example, countries that had Marxism stain their histories, have seen some of the worst atrocities ever. Marxist regimes are some of the most murderous, extreme, and destructive in human history. It is fair and valid to acknowledge, spread awareness, and learn about these atrocities as well criticize the individuals and regimes responsible, but at the same time time it is stupid and wrong to try and claim that the people of these nations are responsible for the atrocities of their countrymen, past or present, or that their country is in a lesser tier on the morality scale because of the Marxist regimes.