These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Considering how often the stereotype of Americans knowing nothing outside 'Merica is poked fun at, it's likely this was intentional.
Crowning Moment of Heartwarming: After spending the entire movie gushing about his new Leica M7 camera, Jamie immediately sells it so Scotty will have enough money to travel to Vatican City to meet Mieke. His justification?
"The chateaus have been here for three hundred years. Mieke's gone in 12 hours."
Crowning Music of Awesome 'Du bist alles was ich habe auf der Welt/du bist alles, was ich will/DUUUUUUUUUUUUUUU du allein kannst mich verstehn/DUUUUUUUUUUUUUUUUUUU du darfst nie mehr von mir gehn!'
Ear Worm: You'll have the song "Scotty Doesn't Know" stuck in your head for days after watching this movie.
Harsher in Hindsight: After Hostel came out in 2005, it can be a little hard to watch a movie that takes the idea of a sex-crazed American backpacker getting tortured while looking to get laid in Europe and plays it for laughs.
Not to mention when they stop at a hostel, where the owner goes on and on about the dangers of staying in a hostel.
Mexicans Love Speedy Gonzales: The European stereotypes are so blantant and over the top that they pretty much cease being offensive and Europeans can just enjoy the mocking of the stereotypes, rather than mocking of the Europeans.
Not to mention the American stereotypes played with as well.