Religions win by having bigger armies and more flexible stories. So while the armies were throwing stones, the religion they touted wasn't set in stone, and people were able to adjust it as variables in reality became obvious. The sun is the center of the universe, no wait, this just in, no its not, but we knew that all along, but you are still all sinners so send us all your money.
Christianity stuck in a few power centers and got forced down folks throats and then it became the norm because it could be modified as necessary by each and every practitioner, so it was easier to deal with than Hinduism, which is a bit more specific about stuff, I've heard. Or the muslim religion, which only has a couple of variants, because despots and such are more normal in their lands and they get to keep things a bit more under control.
Your religion is flexible, but individual followers are not. Once they've made up the Truth, they stick to it despite evidence. And it is that dedication to wrong-thinking that has moved christianity spiraling downward through history, always ready to make things worse.
Needless to say, I'm not actually impressed.