So lets simply pray that gunned men are educated well and let them do their thing. E.g. killing innocent people overseas.
In that case you'll have to consider all kind of perspectives, because what's considered right or wrong varies greatly by who is doing the consideration.
I'm not the one who teaches you what's good and what's bad. I'm just pointing out grave contradictions in other people's justifications that lead to all sorts of things that many consider "evil".
In other words: I'm not the one who will violently oppose your lifestyle, nor will I support those who will violently intervene in your life. Believe in what you want, live with people you like. I'd only like the same respect from you towards me. And in case we have some conflict, I'm all for peaceful non-violent solution. E.g. dialog, public debate, "defamation", boycott, economic ostracism etc. But no guns and ass-kicking (unless someone pulls out knifes and forks, in which case I'd have to run away and/or fight back, but I still don't justify violence).