This is outrageous.
Just about anything German-hosted in the Fediverse is absolutely allergic to the industry and users will lose their fucking minds and hound you to the ends of the earth and send you death threats if you forget this fact.
Basically shitty ideologues who put purity ahead of the technology dominate every level of the discourse there. It wastes everyones' time and distracts from things that actually matter. In fairness, America isn't far behind.
what happened there?
TL/DR: they accepted sponsorship by Anduril, a weapons manufacturer and publicized that fact 3 days before the conference. The German scene is quite pacifistic and threw a fit.
It was unbecoming of any group that wishes to call itself a community and it certainly has chilled participation from reasonable people.