see my above post for why I feel that way
Edit: To answer your question quickly, the right of the people to bear arms was because there was no standing army, so an armed populous was necessary to raise militaries for the individual State defense, and the nation's defense.
I wasn't until the Civil War that we had a standing US army even in times of peace, so the necessity to have an armed populous in order to raise a militia was no longer necessary.
That is why I say the 2nd amendment became for all intents and purposes became obsolete after the Civil War.
Those wanting to fight the federal government are 150 years too late
I have to go to bed now but this is a good subject that really shouldn't be here but its' here now. To your reply I like to say no army or police for that matter protect my house. I do. So I am my own militia so to speak.