I think the simplest thing to be said about messaging and tone is this: If your goal is to say things to convince people to change their behavior, it makes sense to spend some time thinking about how your message and its tone will be perceived, since that has a big impact on how people receive and process the message.

Based on a long career of watching people trying to convince the others, attacking people is typically a failing strategy. Instead, learn how to message in a way that is non confrontational, and most importantly, make it clear what is your opinion, versus fact.