You know, loathe as I do to wish divisions between people, I would much prefer Russia quietly annexing Crimea and the west spending the next year making lame excuses about why they didn't do anything to an open confrontation. There are many negative consequences in allowing Putin to do as he pleases, but there are even more negative consequences in the western powers deploying their troops in or around the crimean territory of openly threatening Russia. A war is truly the last thing Ukraine needs in these times of tumult. Of course, the best possible situation would be Putin withdrawing his troops due to political pressure and the pro-russian ukrainians sorting thing out with their new government, but, alas, it's extremely unlikely to happen. And let's be realistic here: having one tinpot dictator ruling over Crimea instead of another would not change the lives of people much.
It's such a shame that the worst conflicts are often born of the best intentions - all the ukrainians wanted when they were protesting was a better government.
EDIT: Mexico's awesome guys, so is Texas. They are both markedly better than Ukraine and Syria, at least, and you should be thankful for that. Besides, bashing countries is just wrong. Just because the guy in charge is an asshole doesn't mean that there aren't good people in there.