If we let Russia keep getting away with stuff they'll try more and more and it won't end here; besides, these are some major human rights violations, and with most of the world backing us up at a clear political loss it'll probably be seen as justified.
"if we let".
we are not the fuckin world police
Then what are we if we don't help others in need?
Who deserves freedom and who doesn't; just because they're "foreigners" they shouldn't have it? And who is world police? If we let these people do whatever they want the problems will eventually come back to get us, if not just that they've built up in strength and can now rival us, and will.
Japan couldn't handle it's own melt down; Haiti couldn't handle the earthquake; Europe couldn't handle WWII. Someone else, big, has to come in or things will get a lot worse.
"We hold these truths, to be self evident, that all people are created equal, and are endowed with certain unalienable rights, that among them include life, liberty, and the pursuit of happiness."
However, this doesn't necessarily mean war.
http://www.bloomberg.com/news/2014-03-02/kerry-says-u-s-weighing-sanctions-on-russia-over-ukraine.html]Trade sanctions!