Had this happen to me today.
"You know... pretty sure Martin Luther was in large part responsible for all the splits in the church. Major figure. How come I never hear anyone quote him? I mean, I see lots of quotes from Calvin, from Johnathan Edwards, from various popes, from other religious leaders and figures... why not Martin Luther?"
*reads some Luther quotes and writings*
"...Oh, THAT'S why."
(Seriously, I'm having trouble figuring out who's worse to have as your faith's nominal founder: This guy or Henry VIII.)