"How did the police let this happen?"
Among possible other things, they were afraid to be labelled as racist, which would destroy their career. Covering up of crime conducted by immigrants is systemic in German.
I also watched the video linked to above. According to the studio guests, Europe can look forward to wave of viscous crime as a result of mass migration from the ME & NA. 
Vertigo I read the article. I am speechless and feel sick in my stomach. Such a very lenient sentence sends the wrong message.
From the article:
"A muslim who raped a 13-year-old girl he groomed on Facebook has been spared a prison sentence after a judge heard he went to an Islamic faith school where he was taught that women are worthless." This man is a British citizen and has been educated in Birmingham.
I am horrified at this but not surprised.
"I fear looking back at my young life as a golden age for public freedoms for girls. And yes I know assaults have always occurred but face it there will be a lot of girls with their wings clipped now."
I agree, our daughters will have to be extremely savvy, cautious, trained in martial arts etc.. However their wings will be clipped, I never thought this before now, but considering the cover up of assaults on women all over Europe for the sake of political correctness, we are heading for some sort of dark ages.
Regarding Emily and pal, their rhetoric has reminded me of the way Cage minimises crimes conducted by muslims.
blog.cageuk.org/2015/02/study-released-on-muslims-and-violence.html
Cage is an advocacy organization whose stated aim is "to highlight and campaign against state policies developed as part of the War on Terror".
I will never forget an interview with one of their representatives and Jon Snow after Mohammed Emwazi (Jihadi John) had been dealt with. Minimising and gas lighting. Such hypocritical words spoken so 'softly'.
Amnesty used to be affiliated with Cage but have distanced themselves now after the way they dealt with the Mohammed Emwazi situation.