>Girkin (Strelkov) himself takes responsibility of starting the war who is russian
While he indeed played a big role in the uprising (though I think he tends to oversell his role), the cause was strongly supported by simple folk. (Don't forget about the last line in my previous comment.) The videos from the early stages with simple people blocking unconstitutionally deployed military forces is a good supporting evidence for this statement. You can call them "brainwashed by Russian propaganda" all you want, but it does not change the fact.
I see the following reasons: political discussions can be extremely long, and in any case are frowned upon here, and the chance of finding irrational stubbornness for this subject even here is high. So... we're agreeing to disagree then.