Isn't this threat over Russian invasions a bit exaggerated?
it depend how you looking at it.
You must be aware of one very important thing. That is, if we had (you would note that i said HAD!), global `peace` in Europe, in next 50-100 years entire Europe (Russia excluded) would be peacefully Germanized and Anglo-Saxonized. Its a fact. Simple, Eastern Europe (read Slavs) are (were!) overrun by wealthiest and technologically more advanced west of Europe and USA that also sided with rich Islamic factor, all in order to establish its dominance over the continent (read Slavic resources). In it, basic tactics of the NATO, EU and Islamic league was advance by the tactics of local wars and crisis, with the slow capturing the main strategic points.
Now, Russia consolidates economically and technologically. Of course, with the enormous Chinese support. Also, India and Brazil as two new emerging powers also have interest to support Russia.
So, when it was come to Yugoslavia and Serbia, Russia just warned and, was not ready to retaliate. In Georgia and then in Syria, Russia rises to defends its interests. By that time, Islamic world was already recognized Russian and Chinese arguments and gave signal that is ready to retreat. Also, Islamic world was weakened by its internal problems.
Then, NATO and EU, recognizing critical moment of strategic development, moved to destabilize Ukraine. Too late. Russia was more then ready. So, we now have situation that Russia moved from defensive to offensive stance. Now, i clearly see that, Russia is deadly serious. It already gave alternative to the Eastern Europeans, underlining that its not only west of Europe, USA and co. who promising progress.
So, you can say that is Russian invasions a bit exaggerated. It is more counter attack to the NATO and EU aggressive moves. But, in any case, global peace in Europe and just local conflicts are past. Things becoming ugly. i assure you, one wrong move of the Germany, Britain or France, could immediately initiate Russian respond. Be sure that USA won`t risk global nuclear war if any of western European powers gets some Russian ICBM or some other missile as warning shot that would vaporize some target. No, USA magnates and bankers aren`t ready to lose everything. They would rather negotiate with Russia, when they see new situation.
Things changing fast in the world. Changing itself, Russia contribute to those changes massively. So, i wouln`t use word `invasion` but, for sure, Russians are coming, while Germanization and Anglo-Saxonization retreat.