Well Oprah, it goes like this.
Having a voluntary human interaction is acceptable but initiating (by threat of force) an involuntary interaction is not.
Nobody (singular or plural) has any right to initiate offensive force, everybody has a right to defend themselves and / or be left alone.
Your "system" in todays world, yesterdays world and in the future, violates human rights and relies on guns being used offensively.
Speaking of being unable to explain things...why do you believe in two opposing things at once? That taking something from another person without their permission is theft if you or I do it, but "not theft" if certain special people do it. Why don't you address that, so the debate can be relevant?