Whats up with Christian trying force Christianity on to me?

Today at school I was walking around the quad area about to leave to lunch and some people from the Christian club come up to me like every othere day and asked me i cared to join, but i usually just walk away but today i nicely said no, right after they asked if i believed in God and I said no again, they asked why i dont,i said because i don't believe in fairy tales, so they pulled out their bible and started read some lines and paragraph, i just decided to walk away they fallowed me to my car reading the bible still not leaving alone. i told them they wont be able to change my thought about it, then they started saying that im going to hell if i dont become a Christian and that the lord is going to save me. I dont think that they understand that not everyone believes is in God and that they cant force people to Christianity by screaming out that we are going to hell if we dont. it ridiculous they try to convert everyone.