On one thing I agree with Putin, Russia is a unique civilization, apart from Europe. So are we, Britain, Canada and lots of others. Russia, like Britain, is figuratively as well as literally on a pole of Europe, sharing some aspects, differing in others. Treating Russia like another France is a mistake.
Still, resurgent nationalism, such as Putin seems to be fanning in Russia, may threaten to world peace. Especially when neighbors with delusions of grandeur bump.
Putin’s plan to “federalize” Ukraine would make each province autonomous, effectively dismembering the country, and making it easier for Russia to shallow. (How we we take a proposal to recognize each of our states separately, and absorbing those which could be bullied or invaded into joining some other country.?) Europe and America may not be able to stop Putin, but we should not agree.