Slow, manipulative, lies, provoking, ambivalent, awkward, tough watch, pure evil.
***This movie is based on danish culture, and I can understand why some people wouldn't know whats going on or what the point of the movie is. But I will try to make an effort and explain it in short terms***
First of all the movie takes it's time building up suspension. It knows how to manipulate the audience, and it works. Especially if you are danish. The danish couple in this movie acts like most danes normally would in awkward situations. It makes the movie very realistic. The danes would be polite as long as they only FEEL something is wrong. A bit naive maybe, and I think thats what the director is trying to tell us. The danes tend to feel safe, cuz they live in one of the most safe countries on earth and therefore they normally wouldn't be suspecious or think people would harm them. They would see the misunderstandings as culture differences and try to be polite and get the best out of their stay. They wouldn't see that they were being manipulated.
In the first half of the movie the danes gets the sense that something is wrong with the dutch family, but they won't let it affect the mood. But when they SEE something wrong they begin to speak up. The second half of the movie is where the crazy things begins to happen. It's a tough watch, so consider yourself warned.