The title of this thread is "Is a National Firearms Registry Unconstitutional?" That is the question I was answering. I was not answering the question "Is the United States Supreme Court still stacked with leftist activists as it has been since the time of Franklin Delana Roosevelt."
Once again, they are the final arbiter, for better (seldom) or for worse (far too often) as to what is "Constitutional" - you are trying to answer the question from a logic, moral and intellectual position, I am simply trying to find some SCOTUS precedent in a realm nearly void of those qualities.