While I’m doubtful if it’ll help, I reported the site to the registrar and recommend others do the same. abuse@namecheap.com
This is the message I used. (Admittedly, I am not well-versed in legalese and added some links for credibility but I wouldn’t be surprised if they called my bluff.)

The site https://www.charliesmurderers.com/ is hosted by your service. The site is currently in violation of Icelandic law; the location of the hosted site. Specifically, Act on the Protection of Privacy as regards the Processing of Personal Data, No. 77/2000.  See:
https://www.government.is/topics/personal-law/
and
https://www.government.is/Publications/Legislation/Lex/?newsid=fadb4b17-f467-11e7-9423-005056bc530c
This information has also been forwarded to the Icelandic civil authorities.