Now, don't get me wrong: I'm no fan of Mme. Sotomayor (or is it Sa. Sotomayor?) or anything she stands for, but your argument doesn't work:
The issue is not whether the United States Constitution applies to you, but rather what it says. What it says (literally) is that Congress -- and only Congress -- is precluded from infringing on the right to keep and bear arms. What we want it to say (via incorporation) is that neither Congress nor the states may so infringe.
Actually, it doesn't. See my quote in an earlier post. There is a very valid argument that the 2nd was intended as a universal statement and not just pertaining to the federal government