Speaking of which, he did support Syria strikes by Trump

That's hardly a reason to support Trump instead, though I do.

and supported NATO/US policy towards Ukraine in 2013 that brought us to the edge of nuclear war today:

A lot of us did. Let's not forget that Obama was the most rational voice on Russia throughout the end of his presidency (I know people won't like to admit it), and that it was the orthodox Republican position that he should send weapons to Ukraine.

“Putin acted in Ukraine in response to a client state that was about to slip out of his grasp. And he improvised in a way to hang on to his control there,” he said. “He’s done the exact same thing in Syria, at enormous cost to the well-being of his own country. And the notion that somehow Russia is in a stronger position now, in Syria or in Ukraine, than they were before they invaded Ukraine or before he had to deploy military forces to Syria is to fundamentally misunderstand the nature of power in foreign affairs or in the world generally. Real power means you can get what you want without having to exert violence. Russia was much more powerful when Ukraine looked like an independent country but was a kleptocracy that he could pull the strings on.”

(The American president, of all people, would know.)

Obama’s theory here is simple: Ukraine is a core Russian interest but not an American one, so Russia will always be able to maintain escalatory dominance there.

“The fact is that Ukraine, which is a non-nato country, is going to be vulnerable to military domination by Russia no matter what we do,” he said.

Obama interview with the psychotic neocon Jeffrey Goldberg