> You can't have short-term, mass migration

Well, luckily, we don’t have that, eh?

In the 90s and 2000s, Western Europe took over a million refugees from the balkans – by 2005, all of them were deported back.

There was no wave of nationalism back then, no political change.

Even today, in Germany, most are in favor of the current refugee policy.

I don’t see why any of what you said has to happen. It hasn’t happened the last time this happened either.