This is less like Rambo and blood-lust and more like parenthood. The military is constitutionally mandated to be the national protector, much as parents guard their own vulnerable children or a spouse. A parent should understand what it takes to protect his or her child against all enemies, foreign or domestic. When a stranger or even another family member attacks, we defend, if necessary with physical force. When a pastor friend of mine was asked by his wife what he would do if she were attacked, and he had no answer, she challenged the reality of his love.
Home defense has a lot in common with the military.
So does self-defense. All defense is home defense. On a deeper more fundamental level, we are all always in some sense at war. I oppose falsehood, lies, deception, confusion, propaganda, simple-mindedness, and ignorance generally. Total victory, unconditional surrender, when it comes to exposing and dealing with what is demonstrably untrue, are the goals of a university professor.