Nato nor the US will go to war over Ukraine. Putin’s got his Ports, Crimea and South Pipeline bypassing Ukraine so he’s moved on....additionally Kornokopsy nutcase is keeping the firefights going with both sides by his antics....he wants the area to continue in combat so his militia’s just keep it going...... For that.... Putin gets a live conflict on his border which the EU will not further it’s plans for Ukraine much further until that’s no longer the case.
Poroshenko is simply frustrated things have been stonewalled...so he’s letting that be known in hopes Nato will jump into the fray so he can get on with his agenda for Ukraine. He’s an Oligarch and they are still running Ukraine but unable to to get their bandwagon going much at all.
Poroshenko has spent millions of his own money to support the Maidan. You're just trying to make it sound like Ukraine is run by criminals because you can't repeat your old lie that it's run by Nazis.