This is a special case of the church-state muddle that pretty much defined larger America (and Europe before it) for a long long time.
The more I regard it, the less I like it. It dumbs down the church and whitewashes the state. It is better than a world with no faith at all in it, but if we wonder why we can’t seem to find a situation that looks like the energy of the first century church, this compromise with Caesar might be a very good reason for it.
I think personal belief is sacred and whether I find it savory or not is irrelevant.
But for a person applying to take on the awesome responsibility of President, it is of concern to me when he has a belief system where his religion gives him the role of stripping the wealth from the people that hold it and giving it to the members of his church. The rights of those not of his faith are not held as valid. I think a voter would have to be very naive to put in power a person who professes these beliefs unless they were set to be on the receiving end.