German court jails woman for insulting convicted rapist.

And yet you made the statement that there are plenty of people in Western society who fully endorse gang rape.

According to the Bild article she was jailed for what she said. It was an open and shut case for the presiding judge.

You can stick this into Google translate yourselves, it's from the article:

"Sie wurde am Mittwoch vom Amtsgericht Hamburg-Wandsbek zu einem Freizeitarrest verurteilt – wegen Beleidigung und Bedrohung. Das bestätigte eine Justizsprecherin gegenüber BILD"

I think it's ridiculous that they were tried as minors. I don't think anyone wants it being like in some US states where children get tried as adults. But some of these lads were 18. I think for a crime like this (gang rape) 15 is young enough to have the book thrown at you.

And yet the actions of individuals can be indicative of group behaviour/culture. screaming "stop noticing patterns of behaviour!" only makes you sound foolish.
The expert witness for the defence however was happy to attributes culture and circumstance as a mitigating excuse for their behaviour:
Psychiatrist Nahlah Saimeh, who reportedly appeared before the court as an expert witness, said in a controversial interview with Spiegel that the gang rape may have been a way to vent “frustration” due to “migration experiences and sociocultural homelessness”.
Dr Saimeh said perpetrators “who live on the margins of society, completely uprooted culturally, linguistically and socially” could face a “mix of emotions of anger, sadness, powerlessness, depression, fantasies of grandeur as a compensation attempt to cope with one’s own misery, and drug use”. “Disordered, unprepared migration experiences and sociocultural homelessness increase the risk of addiction and psychosis,” she said.
“Sex is also a means of venting frustration and anger, a means of warding off sadness and emptiness, and in a group of men with the same fate it also creates identity and strengthens the group feeling.”
So, not their fault really… poor lost souls just needed the bonding power of gang rape to feel better about their lot as migrants in Germany when they discovered that perhaps the streets of Berlin were not in fact paved with gold. The rapists are really the victims here of a society who's rules, norms and culture they just don't understand, and sure if a little rape makes them feel better, well who are we to judge? That’s right up there with the chap who plead for leniency after sexually assaulting a child at a German swimming pool because he had a 'sexual emergency'.
When you look at statistics that migrants are responsible for 70% of the rape cases in Sweden and yet refuse to believe that perhaps some groups behaviour is less compatible with the culture of their host nations than others, you're really just refusing to accept basic reality. 'Not all'-ism is a logical fallacy. Sure, not all _____ do _____. But enough do as to present a noticeable pattern that the establishment goes absolutely mental about if you dare to notice.