Very easy for the left, ideologically, to shift the blame to all men. They can then refuse to recognise the problem they have helped to bring about.
More positively, there was a demonstration of around 3000 people in Cologne organised by a group called Pegida to protest what happened on New Year's Eve. One of the speakers was an Englishman, Tommy Robinson. I don't know much about his politics, but he was right when he told the protesters:
it is our God-given right and duty to protect our women. It’s what men do.
In a healthy, traditional society men and women are not set against each other they way they are in modern liberal societies. And men do think in terms of "our women," just as women think in terms of "our men" And, yes, the protector role of men is taken seriously.
I also had a quick look at the website of a new German political party, Alternative for Germany. It has two party representatives writing about events in Cologne. Both uncompromisingly reject the open borders policy of Angela Merkel. Frauke Petry, for instance, writes about the Cologne attacks that:
Here we see the terrible consequences of catastrophic asylum and immigration policies in the living reality of Germany in the year 2016...Germany finally needs again a government which is ready to bear responsibility for its own citizens.
Jörg Meuthen writes:
It has become clear how Merkel's naïve "We'll manage it" has plunged our society into a dramatic crisis. The acts of violence on New Year's Eve are the first effects of a dangerous mixture of uncontrolled immigration, obvious government failure, and political suppression of a self-created reality.
Opinion polls do show a steady growth in support for Alternative for Germany over the past few months, roughly doubling from 4.5% to 9.0%. That's nearly one in every ten Germans - which is something of an achievement for a new party. Even so, you would hope that a larger number of Germans might start to question the more established parties, given the radical effects of the current open borders policy.