As far as disputes over ancient impacts are concerned, the hostility that has greeted evidence for the Chiemgau Impacts is exceeded only by that received by the Younger Dryas Boundary hypothesis. But like the YDB team the Germans have soldiered on and continue to publish more detailed evidence to an increasingly quiet room:
Germans Find Cosmic Soil in Historic Context
https://cosmictusk.com/wp-content/uploads/SEM-and-TEM-analyses-of-minerals-xifengite-gupeiite-Fe2Si-hapkeite-titanium-carbide-TiC-and-cubic-moissanite-SiC-from-the-subsoil-in-the-Alpine-Foreland-Are-the-cosmochemical.pdf