New Dog, Very Challenging
Has a link to 'Who Pets my Puppy or Dog" that's what I would do and did do with my "People" Aggressive GSD. He turned out just fine!
It shows the dog "you" are in control and "you" determine his interaction or not with others. He sees people like furniture they are of no concern. He learns what normal human/dog (if you ignore them also)
I'll train my next Boxer the same way...oppsite problem with those guys, "Everyone' is a good time to Boxers!