It would take a constitutional amendment to accomplish what you are proposing so therefore this will never happen.
The US is a republic and not a democracy. Each state already has the right to decide how it is to be governed. Yes, the US has usurped the existing state governments with a lot of laws that the states themselves should decide. There is no question about that. Yes, the Supreme Court can rule that a law or practice by states or the country as a whole is unconstitutional. No question about that either.
If each state had the power to decide what the law is in all circumstances there would now be restrictions on interstate travel and commerce, not to mention that each state would now have the right to decide what laws to recognize from the other states such as marriage, education, business regulations and banking. This country is indeed divided on certain issues but under your system that you are proposing you would now have 50 states entirely deciding their own laws irregardless or the existing law of other states. Instead of the country being divided there would now be division in 50 states and this country would no longer exist in a practical sense.
One day Jesus will take the government upon his shoulder but until then it is best to live the best Christian life that you can, change what you can about laws that conflict with Christian values and love your neighbor as yourself. That's really what it should be about anyway.