Since more than a year Jura1 runs attacks against P2580. Valid IDs deleted, outdated IDs inserted, property properties vandalised, talk page vandalised, talk page blocked for IPs, ID mass-removal initiated while a discussion was under way. And today vandalising the property deletion discussion. https://www.wikidata.org/w/index.php?title=Wikidata:Properties_for_deletion&diff=1011751125&oldid=1011736390
The BBLD is a scientific project run by the publicly funded non-profit Baltic Historical Commission founded 1951. The BBLD IDs are used in the GND Authority File (DE, AT, CH) hosted by the German National Library and by the Deutsche Biography, probably the largest publicly funded biography project for the German-speaking area.
What can be done to stop Jura1?