why should the USA take responsibility for something that Putin did?
I've previously explained this more than once and at length. In brief:
The Duma desiring peace and an end to the cold war appointed known moderate dove Gorbachov as President, due to knowing his long arguing for this course.
Gorbachov set this in motion by a gradual transition to avoid the chaos of a sudden change, but Yeltsin favoured an abrupt change.
Seeing their chance and distrusting Gorbachov's declared communism, the CIA assisted Yeltsin to stir up the mob by lying that Gorbachov was trying to hold up or prevent the change.
It proved easy to incite a mob which rapidly went completely out of control, even launching an attack on the parliament building with a field gun. Sickened by this, Gorbachov resigned, leaving Yeltsin able to take over.
Under Yeltsin Russia predictably descended into total civil chaos with a breakdown of all law and order, allowing the Oligarchs to seize the country's businesses.
Yeltsin had used KGB agent Putin to do some dirty work for him and with that done appointed him head of the KGB. Then in desperate need of a prime minister to sort out the mess he'd made of Russia, he further appointed Putin to that post.
With Yeltsin's alcoholism wrecking his health and making it impossible for him to carry on, he nominated Putin as his successor as president.
Putin got a grip of the oligarchs and used their money to quickly restore order, then loyal to the fundamental objective of his boss, he too opened up to the west, even suggesting Russia could join the EU. But he was snubbed, by the USA in particular, once again out of their hatred of communism and Putin having once been so integral a part of that.
Worse still, the USA embarked on a campaign to expand NATO, Russia's enemy, right up to Russia's borders by actions in both Georgia and Ukraine.
So from beginning to end the USA both blocked Russia from becoming a peaceful part of the world and were instrumental in putting in place the mess we have now.
Take the USA out of the above equation and there would never have been a war in Georgia, there would never have been the present war in Ukraine or any of the actions leading up to it.
OG is right, the USA is a parasite nation, in addition to being an international terrorist nation. We will never have peace unless we isolate them and strip them of influence.
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