1. Does every opinion needs a Reaction or Response?
An opinion is a way someone thinks and how he pictures that idea in his mind and uses his body part to express that view. Many give their opinion based on what they have heard and seen. It is an opinion and not a fact, if it is a fact there are two things involved, either it can be accepted or change.
Concerning response, silence is a response, Listening is a response, saying a sentence is a response. There’s no need to bring a historical fact to prove what they don’t’ understand. You know exactly what you stand for.