My Answer: I think the key word is 'react'. If we want people to respond, then we need to follow the guidance in the following verse: [Quran 16:125 Translator: Sahih International] Invite to the way of your Lord with wisdom and good instruction, and argue with them in a way that is best. Indeed, your Lord is most knowing of who has strayed from His way, and He is most knowing of who is [rightly] guided.
We are all 'convinced' of the veracity of our understanding and interpretation of religion, and nobody appreciates a 'holier than thou' attitude, or being scolded, spoken down to, or worse, ad hominem remarks against their persons or their near and dear ones. We are all human, each one of us has our own strengths and weaknesses, good deeds and faults, and each one is trying from their own level of consciousness and understanding. Nobody wants to deliberately cause temporal or eternal loss to themselves. Besides, every saint has a past, every sinner a future!