(NEWSER) – Samuel Wurzelbacher, perhaps better known as Joe the Plumber, watched Richard Martinez sobbingover the shooting death of his only son in the Isla Vista rampage, and responded thusly in an open letter onBarbwire.com: "I am sorry you lost your child. I myself have a son and daughter and the one thing I never want to go through, is what you are going through now. But: As harsh as this sounds—your dead kids don't trump my Constitutional rights." Wurzelbacher goes on to call suspect Elliot Rodger a "sad and insane individual." Then, "I almost said 'Obama Voter,' but I'm waiting for it to be official," he writes.