How do you propose a Christian can separate his moral understanding from his Christian identity?
No one is asking that you separate your moral understanding from your Christian identity.
I suspect that we may not be as far apart as our exchanges would suggest. I find the Jerry Falwells and the Pat Robertsons (and others) to be offensive in the extreme. You may not ... but when one hears a protracted discussion about how one cannot legislate without injecting their RELGION (notice I did not say their morals) into the equation, then I can understand why some would be afraid that the Republican party would give too much credence to the so-called religious right.
You can be moral and have good values without being apart of organized religion.