The authoritative answer is - NO, IT IS DEFINITELY NOT APPROPRIATE TO PERSECUTE OTHERS BECAUSE THEY DISAGREE WITH YOUR POINT OF VIEW.
Did you get that NKT Survivors? The Dalai Lama needs to tell his students to be kind to everyone. If you seriously think there is no disharmony or suffering being caused by the ban, you are not paying attention. Nobody wants to be calling your Teachers' character into question, but the increase of persecution requires it. If people were not suffering and your Teacher was following his own advice, there would definitely be no need for protests, definitely. It doesn't matter who Dorje Shugden is or isn't, it's about being kind to others. Do you remember that teaching?
This whole situation is so unbelievably fucking stupid.