The same reason people who want attack dogs get german shepherds. The most common schutzhund dog is a german shepherd. I'm not saying schutzhund training is bad but if its any less than perfect it can cause problems. They also scare people because of the media attention. I first hand know of many many attacks caused by german shepherds. Yet I have yet to hear of a german shepherd attack in the media. Like I said before in my state almost the entire police dog population is made up of overaggressive german shepherds. However, like pitbulls many of the german shepherd attacks could've been prevented just like pitbull attacks.