Replying to Religious joke by Lioncourt. (clean)

It's almost time for MLK day and he's semi involved so here it goes.

Where I live, most Protestants call themselves Lutheran.
For non-religiously educated folk, Martin Luther basically broke away from Catholicism and basically said, 'Here's Christ, interpret him however you want'. And that's why we see a whole crap ton of different branches of the same thing. But I digress, here's the joke.

'Oh, you follow Martin Luther? Didn't he free the slaves?'

It's funny because:
1. Abraham Lincoln freed the slaves and has nothing to do with the religion.
2. Martin Luther KING is the show piece of the civil rights movement, so could be related to freeing the slaves.

It makes you look like an idiot, but it's still clever and kinda funny.