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.
YMMV: In Bruges
Acceptable Ethnic Targets: Jimmy, the dwarf actor, believes in an upcoming race war (although he later claims that was the cocaine talking).
Yuri: There are a lot of alcoves in the Astridpark. You use this word, alcoves? Ken: Alcoves, yes. Sometimes. Yuri: There are not many people around in these alcoves at Christmas time. If I were to murder a man I would murder him here. Are you sure this is the right word, alcoves? Ken: Alcoves, yes. It's kind of like nooks and crannies. Yuri: Nooks and crannies, yes! Perhaps this would be more accurate. Nooks and crannies rather than alcoves. Yes.
Dude, Not Funny!: The "Race War" dialogue drew this reaction from some critics. Most were still highly praising of the rest of the film. In-story, almost everyone else in that scene was uniformly disgusted, especially Ken. Jimmy himself later blames it on cocaine, a drug that can quite easily turn nice guys into arrogant arseholes.
"Maybe that's what Hell is, an entire eternity spent in fucking Bruges."
Fridge Brilliance: The (quite racist) discussion on a "race war" between all the world's blacks and all the world's whites could very well be symbolic for the fight between heaven and hell - a central theme in the film. Ray casually asking where the Vietnamese fit in could, in turn, be a comment on purgatory — the in-between place. And Ray commenting that it would be quite a sight to see could refer to the Hieronymus Bosch painting.
Ken's lie about Ray stating "I know I'm awake, but it feels like I'm in a dream." It can be applied to the climax: the movie Jimmy was filming depicts a dream sequence as stated by Chloe; the wounded Ray runs through people dressed like the creatures in Bosch's painting of purgatory that was discussed earlier in the film; Harry shoots who he thinks is a child, then kills himself.
Another interesting one about the finale: Chloe mentions that Jimmy's film is a pastiche of Nicolas Roeg's Don't Look Now, in which Donald Sutherland's character is killed when the person he thinks is a child (his daughter who drowns at the start of the film) turns out to be a murderous dwarf, wearing a similar coat. In In Bruges, Harry dies when he shoots Jimmy, a dwarf who he also thinks is a child dressed in a similar uniform to the boy Ray killed — and who is playing a murderous dwarf who actually does turn out to be a child. On a more general level, both movies are also about people traveling in a foreign city trying to deal with grief and guilt.
Fridge Horror: Why on earth might Harry have wanted that priest killed? Well, he hates anyone who harms a child...
The original screenplay implies that Harry was taken to Bruges as a child by a priest (possibly the same priest), and abused afterward.
Fridge Logic: Harry is using "dum-dum" bullets — either hollow point or soft point bullets — when he shoots Ray. But they would expand when they hit Ray, and would be far less energetic when they strike Jimmy.