Do you think there will be another European war within the next 30 years ?

There's been a dozen of European wars and conflicts in the last 30 years. What makes you think there won't be none in the next?

There's one going on right now in Eastern Ukraine.

yes

Can't imagine. I'm German and I don't think so, because ... why?

The European economy is so much intertwined these days, starting a war within Europe would be madness.

I cannot exclude, however, that Europeans take part in some wars abroad.

Yes its highly likely that the Russians will try and re take Ukraine and the Baltic states