The Christian does not get to tell God what His ethical standards ought to be, or selectively choose to follow certain socially acceptable ones.
There is an aspect of faith that demands that sinful, selfish, or even just “worldly” thinking and behavior be abandoned in favor of what has been clearly stated by God.
Excerpt from the original:
“I’m a Christian because it is true. I’m a Christian because I want to live in a way that reflects the truth. I’m a Christian because my high regard for the truth leaves me no alternative.”