If guns were meant to protect us from our government--well we already have an overtly anti-constitutional, criminal government with disproportionate powers residing in unelected individuals.
Oh but if we make guns illegal--well there already are too many unregistered that it would empower criminal interests, both economically from a black market, and from having relatively more firepower.
Ah but you just want to "save lives?" Well if you want to save people's lives isn't it easier to ignore all this bullshit and do something like go supply clean drinking water to an undeveloped part of the world?