@Dolphinwaves
He keeps having a go. How many messages has he sent - more than one?
He's saying I'm the horrible one but I can't see it?
Why are you even trying to "see it"? To do so is to let him inside your head.
I have had dealings with 2 abusive men in the last decade or so (divorced one, lent the other money), and I was/am able to read their messages with detachment, and not respond. This is because of it taking a year to deal with one of them, while I divorced him. I had no problem in either not replying, or not replying until I was good and ready. The emails etc were useful in that they displayed patterns of abuse and entitlement, as revealed by the abusers themselves.
But that is me. You have not yet achieved this detachment. And you have replied to his taunting, feeling the need to defend yourself.
Your post at 12.30 shows that you know he harasses people. That the police were powerless then doesn't mean that you need to keep messaging him!
I suggest you report to the police, and send him one last message, saying you want him to stop contacting you once and for all.
Then block. And be strong. It sounds like you are not up to reading his messages dispassionately. If he sends another one, and your read it, at least post on here, especially if you are tempted to reply. We won't be cross! We know what it's like, we want to help!