I would like to know how I must react if someone is threating and torturing me because he/she is hating muslims and wants to kill me because of it and is telling me that she/he wants to listen of me that I am not muslim and I am and then become free. What must I do in this situation? And if I dont tell them what they want to hear. Am I dying as a martyr?

You can tell them that you are not Muslim.
No need to loose your life.