Yes, all .de domains down because of DNSSEC failure at Denic https://dnsviz.net/d/de/dnssec/
https://i.imgur.com/eAwdKEC.png
Edit: Alternative link: https://www.cyberciti.biz/media/new/cms/2017/04/dns.jpg
We should frame it as "all .de domains are ready to be impersonated because everyone will disable DNSSEC".
https://i.imgur.com/eAwdKEC.png
Edit: Alternative link: https://www.cyberciti.biz/media/new/cms/2017/04/dns.jpg