I love how boorish, immature, and inappropriate conduct at a sporting event is an American-only thing. It feels like noone has even seen a football match overseas. Sure, some US fans act like idiots but it isn't like they've got a monopoly on it.
Oh boo hoo. It isn't just an American thing but the atmosphere at a football (soccer) game is rather different.
The atmosphere at The Open Championship is generally pretty respectful and appreciative. The galleries have their favourites but they aren't simply based on nationality. Phil Mick is a crowd favourite, for example.
The Ryder Cups in 1995 (War on the Shore) and 1999 at Brookline were possibly the low water marks, with the jingoistic war mentality at Kiawah and the shocking crowd (and marshal) behaviour at Brookline. There has never been a RC in Europe which has come close to either, and there never will.