Anyone in NATO who doesn't have their head up their ass believes the Iraq war was an utter mistake on so many levels. The Iraq war was an imperialistic endeavor driven largely by the American/British oil industries, spearheaded by a Vice President and a President who were both oil men, and executed by countries under the influence of these oil men. The war played right into Al Qaida's desires and still continues to waste the resources of NATO nations. Thus not all in NATO were in favor of this, and it caused an erosion of trust in the alliance. All of NATO was not behind the Iraq campaign, unlike how soo much of Russia is behind Putin's cousin-killing-cousin war campaign for nothing but land, ego, and influence.
Regarding the motivations for the Ukrainian "revolution", Russia would be just as guilty as any other party, and the situation could be framed as a conflict by proxy. A country where the former PM is thrown in jail by a Russian backed president shortly after losing the election is clearly fucked along these lines. So the "revolution" was time in the making, with many people of the public dissatisfied by their "Russian" president. They may have had help and organization from outside influences, but a cadre of CIA agents can't make that happen. You can strike a match but it won't do anything without some tinder. That situation was going to happen whether there was CIA there or not, because being under the Russian thumb is and has been bad for all countries subjected to the power of the Moscow elite. Just look at all the former Soviet Socialist Republics and how much they suffered under the USSR.
No one seriously wants to be ruled and influenced by Russia. Russia is one of the worst countries to be ruled by, the elite in Russia spit on people pure and simple and exploit them. You could say Russia spearheaded industry in Ukraine during the days of the Soviet Union, but all the industry was to make glorious benefit of Russia not the poor fucks without ties to the Moscow ruling elite. The worst example of this was the testing of nukes in Kazakhstan, right where people have been living for thousands of years. Check out the video report done by Vice if you want to see firsthand the results of this atrocity.
The US has fucked up countries pretty hard like Iran and Nicaragua, but the general result of being under the USA's sphere influence is rather prosperous. See all Nato countries, Colombia, Japan, South Korea, Mexico, etc. Nobody's perfect but there's benefits to working with your allies rather than trying to get all you can from them pure and simple. You can't blame the Ukrainian people for wanting to fall within this prosperous influence and join NATO so they can't continue to be fucked by Russian puppet politicians and oligarchs. Ukraine is split however, and certainly the Russian speakers in the east may like that Russian cock, but they would enjoy the benefits of being separated from the Moscow ruling elite just as much whether they know it or not.