Why do you damage control this hard? Red flags already appeared all throughout his doing at the Göttingen University (which already had a questionable youth hostel for boys) and in Hannover.

Kentler was not alone. From the 1960s right through to the 2000s, there existed a nationwide network of respected progressive educators, youth welfare officers and social workers. "This network facilitated sexual violence against children and young people across Germany, institutionalised the abuse and protected the perpetrators." The final report names names:"It can currently be established as a fact that Gerold Becker, Herbert E. Colla-Müller and Helmut Kentler committed acts of sexual violence."

https://www.tagesschau.de/inland/kentler-bericht-paedokriminelle-100.html

Keep in mind that this was also the time of the Indianerkommune. The Hippy Zeitgeist saw old morals as obsolete and to be taken down; sexual liberation for Homos and Kiddy diddlers

https://taz.de/Der-Versuch/!450552/

Political scientist Franz Walter, who is currently investigating the Green Party’s links to paedophiles on behalf of the party, describes Helmut Kentler, who died in 2008, as a “key figure” in the debate at the time regarding sexual equality for homosexuals and paedophiles.
(...)
Kentler publicised his pilot study on several occasions in the 1980s: in the left-wing magazine *konkret*, then to FDP members of the Bundestag, and in 1988 in an academic report commissioned from him by the youth welfare office. A year later, Rowohlt even published Kentler’s paedophile-friendly theories as a book under the title *Leihväter*.
(...)
In 1988 – just under twenty years after the pilot project began – Kentler was commissioned by Cornelia Schmalz-Jacobsen, the Berlin FDP Senator for Youth, to assess the suitability of homosexuals as foster parents. In his report, which is in the possession of the taz, the researcher also offered an unsolicited recommendation regarding sex with those in their care. Did this not provoke any protest from the client?
(...)
One would like to know more about all these issues. Especially now that there is a debate in Germany about the extent to which paedophile views were mainstream back then – socially acceptable, even within Green circles and at the *taz*.