If McRath the Hollow is so incensed about slave trade in other countries, why does he/she/it make it a full-time job sniping at and trashing Americans and British?

Let's see some truly indignant posts trashing the Sudanese, the Aztecs or the Egyptians over slavery. Oh, I know why. McG the H doesn't know its ass from a hole in the ground about those subjects either.