How do I know god is real? Why is christianity so prejudice on other religions?

Ok. Heres my thing. Everytime i get into a rough spot in life and i ask god foe help, I usually end up fixing those problems on my own. Or like when I was a tiny infant I had a cerebral hemmorage and went braindead. unexplainably though I am here today. I like to think the doctors did a good job and brought me back. Plus I keep thinking of all the other religions then the ones of old and compare them to christianity and cant help thinking something just doesnt feel right about any of it. I mean a god that loves you but punishes you by eternal damnation? Really? Thats not what I feel would be a reason to follow. I would rather evade and fear that god as much as possible. Can someone help shed some insight on this for me?