I know I may be opening a can of worms here by being a newbie and publicly disagreeing with user, but here it goes. Please understand that I have a lot of respect for you, based on more than a year of lurking and reading your posts before signing up.news reports, the alleged perpetrator (identified as Jared Lee Loughner) was tackled at the scene while he was trying to reload.
discuss what his alleged beliefs were. You can even find his personal YouTube channel. While there have been a lot of discussions about his beliefs about grammar and literacy rates, and government mind control, I haven't seen anything in the media that purports to give him a focus on the Constitution. Cite please?
Joseph Zimudie was in a nearby store, heard the gunshots, and ran to the scene to render assistance. When he got there, Loughner had already been tackled, and so he never had to draw his firearm, but he helped to restrain Loughner until the police arrived.
I can't really speak much to your other points, but I hope those links help to clarify some of your questions.