How do you know its him though?
The post is an almost direct copy of one on snr.org.uk made under the name Geoffrey Brooks, changed slightly. Both Der Mecklenburger and Geoffrey Brooks have a habit of posting conspiracy theories divided up into multiple parts on unrelated forums. If you google the name you'll find someone who claims to be a professional translator and lives in Buenos Aires, whose "Scandinavian ancestry confirmed by DNA".
On the site axishistory.com, ohrdruf (from South America) is repeatedly referred to as Geoffrey Brooks. There, he says he is from "south america".
And he outright reveals his identity:
"I did send Sid Guttridge a PM with my identity. As he did not receive it and and I see from the material above that it seems to be important to contributors in some way I think I am obliged to identify myself. As Geoffrey Brooks I am the author of two books; "Hirschfeld" (Pen & Sword/USNIP, 1997) which I wrote in collaboration with Wolfgang Hirschfeld, radio operator of U-234, and "FIPS" (same publisher, 1999) an edited translation of the autobiography of WWI U-boat commander Werner Fürbringer. I am also the translator on commission of thirty German language military books for UK publishers."
The user ohrdruf on the site skadi.net (a site discussed favourably on The Apricity and Stormfront) is also a translator. He also lives in Buenos Aires. He also has a habit of posting conspiracy theories divided up into multiple parts but this time it's actually not an unrelated forum.
In his first post on the site, he states:
"I came across this very interesting site while searching Yahoo. I am English and am settled with family in Argentina. I translate works from German and Spanish for British publishers, mainly to do with the World Wars. My main interests are the personality of Hitler: National Socialist religion and scientific projects towards the end of the war, particularly those which appear to have an esoteric aspect: and there is a Viking site in Paraguay which also has my attention at present. I am Reich-sympathetic."
In another post:
"This is a serious enquiry, related to a discussion on another website. If a Viking colony dating from the 13th century were discovered in South America, i.e. before Columbus, would that in your opinion be a "Primal Germanic Territory"?
The reason for the question is that there is good archaeological evidence that such a site exists, and it seems that academics in the northern hemisphere wish to conceal its existence, and I am curious to know why."
Well.