Medium’s response is due to the other author filing a complaint against you.
Now, I personally do not agree with their choices here. I don’t agree with their language in their comments to you or their choice to report your message as harassment.
What you are doing here is actually much creepier, to me, from a free speech perspective. You seem to want them to offer a more active style of policing the way users treat each other.
Why else would you respond to this message with the comparison to the other comments you left, citing the other user’s language as if they should be reading them? They’re only reacting to the other person’s choice to report your private message, but you want them to go through user actions to tell people if they’re being assholes or not all the time? Really?