I think its obvious that Juventus has a bigger fanbase than dortmund.
To be honest, bayern also has some pussy fans, and its easy to admit for me that dortmund has some really passion fans, they cheer so hard and have some great atmosphere in their stadium. But its all about glory, bayern is the biggest club in germany, so they also have many gloryhunters, thats normal as you can see in barcelona, 10 years ago they had -80% fans and now they could increase their fanbase about 80% with 3 CL title in 6 years.
yes true, bayern missed a guy like effenberg, but you forgot also Oliver Kahn

he was a beast aswell!