“There are many atheists and others, some may actually claim to be saved, who actually kill and steal, so, there are truly plenty of people who would not mind if murder and/or theft were legal or unpunished.”
You miss the point entirely. Homicide is illegal because of the people who do not want ***their*** right to life violated via murder, by others, NOT because everybody agrees that you shouldn’t murder.
YOUR point that there are some people who would love to steal and murder, is why we have a law. To protect the people who want to be protected from them.
You certainly can arbitrarily do it. The answer is this,, we do not codify religious belief into law. For example, you do not outlaw eating meat of friday, etc. Law is centered around the individual and their god given rights to life, liberty, and pursuit of happiness. Rights involve what you are free to do without harming others. A miniskirt harms nobody.
“The answer is this,, we do not codify religious belief into law.”
No, the answer is, all law is codified religious belief of one type or the other.
And the religious of all stripes can advocate for the laws they want, in our system, freely and without apology.