It's more fun than the Left-Wing Wackadoodle
Or: America makes a demand of a smaller civ (coughcoughredlinecoughcough), civ ignores demands, -1 influence in region. Four turns later, Rampaging Barbarians spawn multiple infantry, capture several smaller cities. Two turns later they're fielding Armor, spies. American player launches a couple Stealth Bomber strikes, gets bored because he'd rather be microing his specialists in his cities. -3 influence with everybody, Russian player does a spit-take and laughs out loud, continues taking Ukraine. China starts giving Korea and Tokugawa the stink-eye.
England face-palms.
France face-palms.
Germany face-palms.
-17 influence with everybody.
Generally, with the redline fiasco of Syria, most people think the redline comment was ridiculous, but I'm not so certain. Most believe that Kerry saying Syria eliminating their chemical stockpile was Kerry commenting off the cuff, but frankly, it was probably endorsed by the top. America, Obama in particular, straight up DOESN'T want to go to the eternal quagmire of Syria. Obama says redline, Kerry says disarm, Syria disarms. I think America probably got exactly what it wanted out of that scenario. They just wished that perhaps they could have done it while looking a bit stronger. But the reality is, they showed their strength; disarm or we'll intervene in Syria, and then they disarm and America doesn't have to intervene.
EDIT: Summarizing point: America doesn't ACTUALLY want to go into Syria. But they know as a leading member of the UN, they're not supposed to just sit around while chemical wweapons are thrown at civilians. So the main thing is stopping the chemical weapons. Obvious, costly, way: go in and take them. Less obvious, less costly way: convince dictator to disarm. It's certainly no moral-high ground, but the desired effect was achieved. Immediate diplomatic boon. Long-term malus with Russia? Maybe, but when America had it's troops in the middle east last time, Russia seized Georgian territory. So very possibly Russia expands either way.
As for ISIS and Russia looking at Ukraine, ISIS wasn't a real problem until AFTER Russia was interfering in the Ukraine with spies and eventually "green men." Maybe the Syrian thing emboldened Putin, but really, Putin doesn't need an excuse or a democrat president to seize territory through proxies or interfere with sovereign states; see Georgia, Abkhazia and Moldova. He's an old-school tyrant, obsessed with Russia's (and his own) greatness and determined to make people fear Russia, while expanding Russia as much as possible territorially. He's learned the lesson of Hitler, Napoleon and Bismarck; grab too much too fast and you get a war with nervous world powers. Seize a little at a time, rally the people behind the message of foreign boogeymen, and you CAN expand your borders. He's even added to previous war doctrines by adding cyber attacks to the mix (though these cyber attacks are mostly about disrupting communication and supply lines, which is in and of itself an already-known strategy; he's just adding new tactics to it).
I don't think it's fair to say Germany and France face-palm. They are doing even less than the US when it comes to dealing with Russia. The Western Europeans barely care about EU countries in Eastern Europe, let alone countries in Eastern Europe outside the EU. Germany is more worried about where it's energy comes from than what happens to Ukraine.