If you swapped out the word "Europe" with the word "America" it would remain just as applicable. This is Putin in a press conference with Macron a couple of days. Link in the comments. Putin:

"Do you realise that if Ukraine joins NATO and decides to take Crimea back through military means, the European countries will automatically get drawn into a military conflict with Russia? Of course, NATO’s united potential and that of Russia are incomparable. We understand that, but we also understand that Russia is one of the world’s leading nuclear powers, and is superior to many of those countries in terms of the number of modern nuclear force components. But there will be no winners, and you will find yourself drawn into this conflict against your will. You will be fulfilling Paragraph 5 of the Treaty of Rome in a heartbeat, even before you know it."