NATO : FROM DEFENCE TO OFFENCE AND BETRAYAL

I just read this on the NATO website:

It is often said that the North Atlantic Treaty Organization was founded in response to the threat posed by the Soviet Union. This is only partially true. In fact, the Alliance’s creation was part of a broader effort to serve three purposes: deterring Soviet expansionism, forbidding the revival of nationalist militarism in Europe through a strong North American presence on the continent, and encouraging European political integration.

...The fall of the Berlin Wall on 9 November 1989 seemed to proclaim a new era of open markets, democracy and peace, and Allies reacted with incredulous joy as emboldened demonstrators overthrew Eastern European Communist governments. But there were also frightening uncertainties. Would a united Germany be neutral? What would become of nuclear weapons in former Soviet republics? Would nationalism once again curse European politics? For NATO, the question was existential: was there any further need for the Atlantic Alliance?

NATO endured because while the Soviet Union was no more, the Alliance’s two other original if unspoken mandates still held: to deter the rise of militant nationalism and to provide the foundation of collective security that would encourage democratization and political integration in Europe.

[source : A short history of NATO, NATO, http://www.nato.int/history/nato-history.html, Accessed: 18th June 2015]

Deter the rise of militant nationalism, eh?

Provide the foundation of collective security?

Please correct me if I am wrong but didn't NATO just use "militant nationalist" neo-Nazis in Ukraine in a violent coup to overthrow a legitimately elected government and install one of their puppets Arseny Yatsenyuk, and thereby piss on the graves of all those who died fighting to destroy Nazism during WW2?

And hasn't that coup destabilised not just Ukraine but the whole of East Europe, thanks to the #PutinAtWar fearmongering campaign driven by the rotten Atlantic Council, with NATO now looking to entice more and more nations to join and bring NATO closer and closer and closer to Russia's border, thereby betraying the Gentlemen's Agreement that NATO made with Russia when the Berlin Wall came down that NATO would not expand one inch east?