I may have overlooked some posts in this thread, but I didn't see anyone poking fun at fathers defending their children. I did see a few people who responded to the hostile desires/urges some people directly and indirectly made. Also, what is there to "defend" their children from exactly? The lies and distractions people and commercialism make that take away from the birth of our Savior?
Being a bit hyperbolic for a second, if an atheist came up to a Christian and said, "God isn't real, Jesus is a plagiarized pagan god like Horus." ... and the Christian man decapitated the atheist with his samurai sword, he doesn't get the luxury of saying "Well, I was defending God." That isn't exactly how one should "defend" God... that is more of an immature and juvenile mindset that shows a refusal and/or an inability to cope with anyone that says something contrary to what they believe in.