Instead what happened was that Germany took in a several hundred thousand refugees and migrants, which was a logistical challenge that was met.
The cultural and integration challenge was initially under discussed but hardly relevant to the immediate humanitarian issue.
Crucially though, that under discussion was quickly self corrected. The big center left media organisations have clearly talked about these issues. And not years after the fact but pretty quickly.
The idea that somehow collectively the left, the German media or some other institutions have turned a blind eye towards the challenges implied is a complete myth.
For example, in the biggest left weekly newspaper, Die Zeit, pretty much immediately after the cologne harassment events in January 2016, the headline article on sexist Arab culture.
http://www.zeit.de/2016/03/sexismus-fluechtlinge-islamismus-...