What is even more scary is that they can't seem to take watching something that is against their views. I can read the Korana nd I won't become a Muslim. I can see this movie and not become an advocate for euthanasia. They are so weak willed and weak minded - and thus the project that weakness on to others - and the assume everyone is this weak willed and weak minded - that if people go to see this movie they will be converted to being pro-euthanasia.
I don't know why people don't look into the things they're going to see, but if they do and find something that doesn't agree with their point of view, why not use it as a refresher course in why you believe as you do?