I hope
@iaatpies isn't suggesting I'm a tim sympathiser!
The clover has been used by the city for hundreds of years before the filth were created. I will admit it does take some mental arithmetic that it's a different clover to the filth, not related to the filth and the green isn't filth green, though. My German friends all support them so it's probably actually a similar situation with Iaatpies and Mannheim, despite the unfortunate colours!
Edit: Any time I've been (last few years) they come out to the Kleeblatt anthem.
Anyway, enjoyed Dusseldorf. Good atmosphere in the away end and a decent home atmosphere. Nice stadium inside but not much to look at from outside. Facilities in the stadium were also good. And Dusseldorf is good for drinking.