Ukraine crisis is only because of the swollen head of the Americans as they were expanding NATO ignoring earlier promises ..As the only super power, they undere

Ukraine crisis is only because of the swollen head of the Americans as they were expanding NATO ignoring earlier promises ..As the only super power, they underestimated the Russia..If we blame Putin, for this invasion, Americans should answer for invasions on Iraq, Sudan, Yeman, Afganistan and many others ...