Lawrence remembered in the episodes before an old tale he was told when he was a kid about the Yoitsu village being destroyed or that it dissapeared.Originally Posted by KrayZ33
He got that confirmed by the "witch".
He didn't know what to do with that piece of information, he probably should have told Horo long ago, but wasn't strong enough to chose and ends up in a mess.
On the other hand, I think Horo is a bit hard on him and I suspect her to know, deep inside, something is wrong about her home village... And she probably vented her fears on him through her anger.