I don't think your gun ownership is irrational, and I think the way you handled your near break-in should be applauded.  It wasn't the only way to handle it (I personally would have no problem with you shooting the individual after he entered your house), but it was handled none the less.  I do disagree with your comment regarding the framers and semi automatic weapons though.  My guess is if you were to show them an UZI back in the 1700's they would have very much been in favor of every man (white men anyways) owning one.  The musket was the most powerful weapon they could imagine a person owning, and they definitely wanted "the people" to own one.  That they couldn't imagine an UZI doesn't mean that their intent was any different.  They couldn't imagine Scientology either, but I honestly believe that their intent was the legal practice of worshiping what ever you wanted, however you wanted.