Dinesh D’Souza, the man behind the controversial new documentary America, jumped into the lion’s den today with an appearance on MSNBC, facing off against Ed Show guest host Michael Eric Dyson and panelists Eric Boehlert and Zerlina Maxwell over slavery, America’s comparative ills in world history, and whether President Obama is a dangerous “radical.”

D’Souza contended that people exaggerate past sins like taking land from Native Americans and slavery. Dyson challenged him on slavery, arguing it was worse (to a degree) when America did it because there was actually religious justification being trotted out. D’Souza pointed out there were free black slave owners back then, and furthermore, slavery was abominable, but the United States “fought a great war to end it.”

Boehlert challenged D’Souza on another issue he’s raised: Obama and Hillary Clinton are radicals influenced by Saul Alinsky tactics. Boehlert said D’Souza completely misrepresents liberalism and makes…