The United Car Manufacturing Association and its members all agree that manufacturing cars is what the UCMA is all about. But, they say, you cannot be a member of the UCMA if you don’t believe that little pixies push the lifters in the engine.
If it is true that manufacturing cars is what the UCMA is all about, then the only beliefs which matter are those one can act on, and all of those will be related to the manufacture of cars.
So when a member of the UCMA says it is a central belief of the UCMA that little pixies push the lifters in the engine, it can not be a central belief. It cannot be acted on, nor does that belief lead to the manufacture of cars.
In the same way, “God is triune”, “Jesus walked on water” or “Jesus was raised from the dead” are not and cannot be central beliefs of Christianity except that they are about tradition and community, but certainly not anything to do with being “saved”. That is, only if being Christian has anything to do with being like Christ and human solidarity and well being.
Is God triune? If so, good for God, Jesus, and the Holy Spirit! Can Jesus walk on water? If so, good for Jesus, isn’t that neat! Was Jesus raised from the dead? If so, that’s great for him; he really did get the crap end of the stick anyway and now he’s alright!
Do little pixies push the lifters in an engine? If I’m serious about manufacturing cars, should I say anything but “Who in the hell cares!”
And Christians wonder why there’s a huge reduction in UCMA membership. How can there be surprise at that?! Prospective members wanted to manufacture cars! They formed their own association that actually centers around … manufacturing cars! For the most part, they call themselves Secular Humanists or “Nons”.