I think your making a funny.
I believe the opposite is true.
The religion maps I looked up seem predominantly Christian / Muslim. and they both doctrinally believe that Christ existed. (but hold him different regard.)
I believe Buddha existed but I am not a Buddhist.
However, I am not sure you exist. What evidence can you produce that would survive hundreds of years of scrutiny? It is a tough engineering problem. Keeps genealogists very busy.
After several years of disappointments during the "chinese gift exchange", I have finally discovered how to get a good gift. I buy something I really like but my coworkers don't, and I after pretending to mull over the wrapped presentsI choose my own gift. Licking it or hiding in the bathroom ensures that I keep it.