> Germans don't have to learn about Turks
Why not? If they reside in the same country, mutual culteral understanding can be key for integration.
> Turks have to learn about Germans and blend in
We can have both, Germans learn a bit of Turkish, Turks learn German, where's the problem?
> If they can't, that's a very serious failure.
Where above is it indicated that Turks are failing to learn German?