I'm no evangelist, but I find that people often start a conversation because they want to be informed, and I try to oblige.
Those that want to tell me all the ways in which I am wrong are free to do so at length, as I drive away.
If someone asks me actual questions (not "leading" ones) I am happy to tell them to pros and cons of my car. if someone asks "How far can you actually go on a charge?" or " is it true that you have less maintenance?" or "what was the buying experience like?" I have no problem engaging in a discussion with my actual experiences.
If someone, however, asks something like "How do you go on a road trip? I drive 6 hours at a time when i go on a road trip and that isnt possible with an EV" or starts in on ANY topic around "the environment and the real cost of EVs" I am in no way shape or form interested in that discussion (here or elsewhere, actually).
So, in that case, I answer briefly and disengage from the conversation.