It seems to me we ought not pick and choose when to invoke state’s rights. We either believe we are a union of states each with the mandate to govern themselves or not. We’ve already seen how this has worked out in the hands of the federal government. At least I would have the option of moving to/living in a state that most reflected my moral and political viewpoints. Not so when the federal government gets to decide for all of us.
So if a State decided to make it legal to kill mentally retarded people that would be OK under the guise of “States rights”? I fail to see how murder is a States right. What part of life, liberty and the persuit of happiness includes a states right to legalize murder?
So, you want innocent human life protected only by travel inconvenience, rather than by the full force of American law and justice.