The only time I’ve ever gotten shit for being an American in Europe was from some skinheads on a train in Germany who got double offended at my rainbow US flag patch, who yelled a bit about American globohomo propaganda until the conductor told them to quiet down. Which was actually extra hilarious because they were basically just like “you’re lucky this old man scolded us in the German language or you’d have been in big trouble.” Which is possibly the most German thing ever.