Thus, if I'm reading you right, you believe that only those who believe exactly as you do are actually Christian.
I happen to think differently. So, I suppose, in your mind, that makes me not a Christian.
Personally, I've always believed that the opposite of faith is NOT doubt. The opposite of faith is CERTAINTY. Faith is trusting in that which we do not - in fact CAN NOT know.
The belief that one is SO right in their practice that they deign to know the mind of GOd are actually the ones who are not strong in their faith.
Those who believe that the laws should exactly reflect their Christian moral code are, indeed, the least confident in their faith - because they wish to make those whose free will is unlike theirs into criminals.