One thing I have seen with this situation, is if someone is asking genuine questions, but gets some aggression (but also answers) they will act with confusion and frustration, not the "liberal smugness" what trolls have.
Explaining to these people that we do get a lot of trolls and people in bad faith asking similar questions is usually enough to help them understand. Someone who is actively against us from the start won't change their mind regardless of evidence, and someone who is curious isn't going to just automatically go away because some people were rude. The key there is some people though. If they only receive hostile responses, they will leave.