Thought the following links might help. I found pictures of a rally in Cologne in 2002 with Manfred Rouhs, Markus Beisicht, and neo-Nazi Siegfried Borchardt (otherwise known as “SS Siggi”) in attendance. There also appear to be signs referencing the NPD (National Democratic Party of Germany).
Excellent links exposing the Pro-Cologne movement. It seems “SS Siggi” has been a part of this movement for a while. I has also attracted participation from a number of others, including Axel Reich and NPD members:
Link1, Link 2, Link 3
Read the whole site. Very juicy stuff. Anyone who doubts Pro-Cologne is linked to the neo-Nazis is nuts.