As always, of course, you're speaking from a position of deep ignorance, and lack of standing, with regard to American governance.
Nearly all laws and enforcement in America are supposed to be at the state or local levels, not at the federal level. The federal government is only supposed to have authority over those things that are explicitly delegated to it in the Constitution. That is the point of the Tenth Amendment.
It is up to states and localities to determine what laws they will enact, against what behaviors, and how, within the limits imposed by the Constitution, these laws will be enforced.
If someone commits a murder in New York city, for example, that's a matter for either New York city's government to deal with, or the state of New York. It's at that level, even that the law against murder is to be made, assuming that New York determines that murder is to be illegal. None of it is any of the federal government's business. Theoretically, a state could legalize murder, and it would be the right of that state to do so.
The great men who founded this nation, and wrote our Constitution, placed greater trust in the governments of states and localities to enact and enforce laws in the interests of their people, that in a distance, much-less accountable federal government.
The Confederacy did have a valid point, that within the framework of our Constitution, the federal government was acting illegally in trying to ban slavery nationwide. Until the Thirteenth Amendment was ratified, giving this authority to the federal government, the federal government had no legitimate power to tell states that they could or could not allow slavery.
