A fascinating report. I'd not spotted the original incident in Berlin, Cologne got the headlines:
The failure of a recent Russian propaganda campaign in Germany tells us that Kremlin strategists know nothing about the country, nor its sizeable Russian-speaking population.
What was Operation Liza? Two passages give you a glimpse:
Last month, the disappearance of a 13 year-old Russian girl in Berlin caused a series of scandals. When the girl, Liza, returned the day after her disappearance on 11 January, her family claimed that she had been abducted and raped by Arabs. This assertion led to demonstrations by Russian-speaking Germans, heightened interest in the story from Russian media and a verbal conflict between the German and Russian foreign ministries. Indeed, the active involvement of Kremlin media (and Russia's Channel One, in particular) in stirring up anti-migrant feeling among the German public has led to the incident being christened “Operation Liza”.

But believing in the success of this action only amplifies “Operation Liza” further: the story may have been a lie, but it demoralised the enemy and caused it palpable damage. There is no more truth in this claim than Russian television’s initial story of the abduction and rape of a “Russian German” girl in Berlin. From the very beginning, the police denied that Liza was abducted and raped. Later it came out that Liza was afraid to come home because of problems at school. She stayed at a friend's place.
As longtime readers will know I am interested in the "kith & kin" factor, when old and newly established communities are influenced by the 'old country'. The article has lots of information on the 'Russian Germans':
...people from the former USSR are the largest diaspora in Germany today, it is one that exerts its influence on both public life and election results.

(Later) "Repatriates” account for around five percent of the German electorate, making them a significant voter group. Most of their votes have traditionally gone to the CDU, and the loss of this constituency to other parties may affect the political balance of power.
Link:https://www.opendemocracy.net/od-rus...n-liza-failed?

The "kith & kin" thread:http://council.smallwarsjournal.com/...ead.php?t=8829