That life is truly sacred is the reason why people should bear arms: to protect against those who don't think so. Guns are the best tool for that, that has ever been invented.
No they aren't. Guns are in the least signs of aggression. They loudly state what their intent is. A gun doesn't say 'Hello' at you. And anyone who has ever had a gun held to their face or pointed at them felt threatened. Whether the person held it with a malicious intent or not, the person having a gun pointed at them felt fear.
If a person carries a weapon in order to make others see their point of view, then they are attempting to coerce another into a way of thinking. Rather than using words, compassion as a method of example, you're using force. That it itself is a disrespect to life and an infringement of autonomy.
If the gun is the greatest tool in making everyone come around to the appreciation of the sanctity of life, and the recognition of life as sacred, and creation as holy, then why after all these years after the creation of the gun, we still have endless, senseless violence? Violence that is only propagated by gun. My gun wasn't big enough to kill you, so I will make a bigger one.
If indeed it was the case that gun would ultimatly make others come to our point of view then wars would have no longer been fought after the first war between peoples.
If you believe guns are evil, then you favor disarming the police, and military -- right?
In her book "The Ethics of Ambiguity" Simone De Beauvoir refers to the police force as 'lazy brutality'. And I agree with this. A gun doesn't stop ask what the motivations behind a person's act is. It doesn't analyze that perhaps oppression and marginalization, and depravation is the cause behind criminology. A gun is also prejudiced. A gun is never held at the head of a corporate king pin that was ripped of society and exploits children in the third world, or sexually harasses its employees.
So I do believe firmly believe that guns should be banned everywhere. Violence has only bred violence. The police force doesn't have much respect from societies; rather they instil fear, especially now given the situations that we're living in which there is so much mistrust and aggression in the name of 'security'. I can guarantee this to you: A terrorist will most likely never harm me. I somehow doubt that I'm the guy Osama is after. And therefore I do not want anyone imposing their security upon me. Much less with a weapon in order to make me feel degraded and at another's mercy. It is my right as a human being.
Now, I recognize that that to ask forces to give up their weapons is unrealistic and impractical now. There's no way this could happen. There is too much hatred, mistrust and prejudice in order to be able to put down a weapon. But the reason societies cannot put down weapons is because they have come to rely on them as their means of as you stated above
to protect against those who don't think so
And hence the reason why human kind will kill it's brethren with the same guns meant to make us all come around to a uniform way of thinking and once devastated completely kill himself.