It is not necessary that you share my beliefs to appreciate the simple and unavoidable logic behind what I have stated. A merit based salvation system is a logical absurdity. Just try and create one your self (any type you wish) and you will quickly see it is an ambiguous nightmare.
The God I describe is a God that insists on moral obedience. In fact he is the being most associated with moral commands, more than any other in history. However salvation is not a reward for good behavior. It can't be. His standard is perfection. No one achieves this. I am not discussing my preference between two concepts. I am describing why one of the can't possibly be true. Merit based salvation is a logically incoherent standard.
There is little about any God that would be easy to swallow. The idea of belief in one man who lived in the ANE is not any harder to swallow than believing a disembodied mind, is timeless, non-material, and does not require space to fit into created everything that exists. Especially if that man born in an obscure backwater against all odds and even being killed has become the most well known being in human history. I think you point was concerning universality but Christianity is the only faith that is present in significant numbers in every nation on Earth so that contention would demand you accept it if that is your standard. I do not believe things based on what I wish to or not. I believe things that appear to be true no matter how bizarre they seem (or not). I came to Christianity kicking and screaming because in spite of the wall of objections I threw up as a shield I eventually just could not deny it's evidence any longer.