Your side has though, that is what we are discussing right now, Russia killing it's way right up to NATO's borders.
Putin is enough of a chess player to know the difference between the Ukraine (non-NATO member) and Poland (NATO member), more so than Hitler who did not know the difference between Czechoslovakia and Poland.
The real threat to Europe is not from Russia invading, it is from the Muslims subverting Europe from within.
On a separate note regarding the NATO map that you posted above (#37), I don’t think Turkey will hold NATO’s southern flank much longer. In fact, I don’t believe that Ankara can be counted as a dependable ally even today. Recep Erdogan is taking Turkey in a bad direction, and it appears that a lot of Turks want to go there with him. While this change will have implications in the Black Sea, I am more immediately concerned with its impact in the Middle East.