If any race of people should not have guilt about slavery, it's Caucasians.
If you commit a crime, you're guilty.
Global warming people ignore nature; they ignore water vapor; they ignore sunspot cycles and sun activity. It's typical liberal guilt and politics wanting to blame western societies and lifestyles for causing all these problems because it leads to government and United Nations solutions, and that's where liberals like power vested. And of course when people come along and don't agree, they gotta be shut up.
Everybody is laden with guilt.