How far down the rabbit hole do you really want to go?
This is the smoking gun, as far as the US-brokered coup in Ukraine is concerned.
Obama admitting his role in the US-supported coup in Ukraine, a war crime. (First video link below).
Victoria Nuland, Assistant Secretary of State for European and Eurasian Affairs at the United States Department of State, admits in the second video that the USA supported the Ukrainian coup with 5 billion dollars. Note the Chevron symbol in the background of the video. John McCain (Senator Lovewar himself) and Victoria Nuland were in Ukraine in December 2013 amid the mass anti-government protests. (The third video is of John McCain in Ukraine addressing protesters.) During the visit, McCain met with Ukrainian opposition leaders in the country’s capital of Kiev, voicing his support for the protests, adding that he saw Ukraine’s future with Europe.
Biden's youngest son, Hunter Biden was hired to the board of Burisma Holdings, Ukraine’s largest private gas producer.
The proxy Ukraine war is all about energy. The Eastern part of Ukraine is the major oil and gas producing region of Ukraine accounting for approximately 90 per cent of Ukrainian production and according to EIA (The American Energy Information Administration) may have 42 tcf (trillion cubic feet) of shale gas resources technically recoverable from 197 tcf of risked shale gas in place.
George Soros is heavily invested in Ukraine . . . . To the tune of about one billion dollars.
It is no secret that the US was funding anti-government NGO's in Russia either, and Putin put an end to them for a reason.
Obama admits the US-sponsored coup:

No pattern of behavior here at all, right?