Up until recently, he wasn't convinced that Earth was real. Forget about any knowledge of Earth history.
"That sounds worse than even the worst of the Twelve Colonies was," he says sympathetically, a little surprised by how closed-minded Earth seems. Although he'd guessed from a few interactions he's had in the prison that the planet isn't as liberal as most of the Colonies were (Sagittaron excepted, possibly) that's... extreme. "Not that there weren't bigots everywhere, but color and gender were never an issue. I probably shouldn't ask what happened to the unlucky ones, should I?"