"Criminals don't obey gun laws" is such a stupid argument. By that logic, there's no use for any laws ever, because criminals won't obey them anyway. Also, the Constitution is not some holy document. It's been amended and revised many times, as evidenced by the 2nd AMENDMENT, and lots of parts of it have been reconsidered in the nation's history. We took out the part allocating certain votes for the possession of slaves, for instance. Believing everyone has a right to bear arms morally is one thing, but it being in the Constitution isn't justification for it staying in the Constitution, if it's no longer in the nation's best interest as a whole.