Fear of the unknown.
Lots for reasons for that and they are very complicated. One of the most important reasons was becoming the state religion of the Roman Empire in the 4th century. That established Christianity's permanance in the West that continues to this day.
Why Christianity over other religions of the time, like, say, Judaism? Judaism was present in … Read more
This article explains all you need to know about doing that. I would read it well before you start any copying.