When one steals, assaults, rapes or murders another their will has been violated and that is offensive whether the victim is religious, or not.
Morality laws are those that are designed to protect an individual from his own poor judgement, or lack of "religion."
As a religious person, I believe that God granted us our agency not because He expected us to make only correct choices, but because He knew that we might learn from our mistakes.
Liberty allows one to make the wrong choice, ie tobacco, alcohol, prostitution, etc. Protecting liberty seeks to protect one from the poor choices/judgement of another, ie, driving drunk, driving stoned, etc.
This is what is disingenuous about the anti-drug/anti-terrorist TV ads. It is the anti-freedom drug policies that have created a black market in which terrorists can profit from the drug trade to fund their terrorism. Not unlike inner city gangs who fund their weapons purchases using the artificially created economy of the underground drug market.
It is simple. A law is just when it preserves liberty for an individual, or society, from being deprived by another's actions.