The movie starts with an atheist Austrian family meeting their daughter that recently converted to Islam and wearing the full Islamic clothing the Hijab and Abaya and while all of us (the audience) are wondering why did she convert they keep beating around the bush and trying to make jokes until the scene ends and the same thing happens in the following scene and we never get an satisfying answer to such a question that represents the main premise or the main subject of the film instead later on we get the impression that she only converted to support the right and freedom of minorities and she's not convinced that Islam is the truth.
Therefore we never empathize with the daughter and she feels very annoying with her constant complaining and arguing and disrespect towards all her family members especially her mother which is against the basic teachings of Islam on the other hand we see her committed to some Islamic rulings that are 10 times less important than respecting your parents and being nice to them.
The movie paints Islam in a very bad false picture making some Muslim characters say false facts about Islam and taking many Islamic teachings out of context and presenting them to the audience without any explanation.
I don't advise anyone to believe anything the movie says about Islam most of what's done and said in the movie about Islam and Muslims is not true, if you want to learn about Islam please do your research on the internet yourself from credible Islamic sources not from the enemies of Islam.