If you destroyed it, they would probably just find another place to do it. [ Not to mention possible curses that could follow as repercussions. Dipper hadn't dealt with anything like human sacrifice back home, but all the lore he was familiar with indicated that any place where a lot of murder happened were extremely dangerous to mess with. ]

But...it still kind of feels like that would be the right thing to do. I mean, if it sets them back, even for a little while...