How do you mean protest? Do you mean people in the streets? No, that didn't happen.

Do you mean inter-governmental protest in the form of summoning an ambassador and dressing them down? In the form of sternly worded demarches asking for clarification? In diplomatic discussions that frankly announced our relationship was injured? Yes that very much happened. A relationship was impaired and Germany was quite diplomatically clear about it.

Diplomatic protest does not need to be public to be effective.