[Boudica]

Russia does one thing in defence of itself and all the little sheep pile on like Putin is the next Hitler.

Austria, Czechoslovakia... Crimea, Ukraine. I can see why people make the comparison. The Soviet Union lost its erection (and remaining territories) in 1991. Russia is attempting to annex a territory that claimed independence almost 30 years ago.

Exactly. My personal opinion is that the Ukraine has their own right to make their own decisions. The west and Ukraine may never ally, and if the Ukraine had made agreements with Russia to be allies, do you think NATO would be invading? Of course not.
Given that many Ukranians have brothers, cousins and other family and friends in Russia, I don't see how they're likely to want war with Russia, and therefore not a threat in their own right. However, they have been invaded for entertaining a relationship with the West. I truly hope that one day, in years to come, the west and Russia will be on better terms. The world would be a much better place without these two powers flexing at each other.