So... you have never eaten in a Chinese, Japanese , Thai , Indian... or other ethnic style restaurant... and certainly not Kebab Houses. (mainly Muslim).
Pumpkin - please do feel free to join the rest of the world - there are many, many wonderful people out there. Their beliefs are their own business. Meet them person to person with an open mind. Your beliefs will not be contaminated by theirs.
You can remain christian, they can remain in what ever religion they profess. Religions are not contagious!!