The point 420blazeit69 is making is that for decades the US has been waging wars either proxy or direct and will point to how necessary it is for US intervention in the situation. In Afghanistan it was the first Al Qaeda then Taliban, in Iraq it was Saddam Hussein's WMDs. Al-Qaeda was originally funded by the CIA to fuck with the Soviets who were in Afghanistan. Saddam Hussein was part of a US backed assassination plot to kill the leader of Iraq in 1959 and only because of that failed assassination did the Ba'ath party really rise to prominence. The US makes decisions in its own self interest and damn the consequences, but it'll also use its own consequences as further justification for continued intervention.

In this instance 420blazeit69 is referring to how NATO is an anti-soviet turned anti-russia alliance. Somehow Russia's borders seem to be right up against a bunch of US military bases. The continued expansion of NATO further east into Europe is threatening to Russia. The US has done regime change in Ukraine, the US is right on Russia's doorstep and people are shocked to see Russia react. The US damn near ended the world with the Cuban Missile Crisis. This war could have been avoided if US and NATO had just kept to themselves and in the end the people hurt by this are the Ukrainian working class being thrown into a meat grinder as western capitalists converge to further divvy up what's left.