I think if you peeled away all the fakes, the whole fucking religion would be left with a hard-core membership that's about equal to the population of Dayton, Ohio.
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This seems about right.
Of course, you could summarize the core beliefs of Christianity as "The belief that a cosmic Jewish zombie can cause you to live forever if you symbolically eat his flesh and drink his blood, and telepathically accept him as your master, so he can remove an evil force from your soul that is present in humanity because a woman formed from a rib was convinced by a talking snake to eat the fruit of a magical tree."
If you were consider the basic tenets from a rational perspective, of course.
You seem to be focusing on the part where the proper Christian follows the dictates of the Jewish zombie.
I don't think that this is the salient point of the Christian message for most people who call themselves Christians.
Some of whom might express the following thought: "If Jesus were Jewish, why does he have a Mexican name?"