Most likely the result could be a third world war. But this is history. Old Threats to Europe has disappeared, new has emerged. Some besserwissers claims that there are no more threats to Europe at all. We have heard it before, many, many times.
History is full of people who know everything about the future.
It's interesting to go back and read old forecast about the future. Nearly all of them are completely wrong, whether they forecast hell or heaven. But we should at least have learnt something from what has happened after 1989. Hundred of thousands of people have killed in a conventional war in ex-Yugoslavia, just to mention one thing which was not foreseen the night the Berlin wall was opened. Nothing is more dangerous than a false feeling of security.