I know you don't. Or at least you say you don't...
Your question cannot be answered because it's a flawed question.
First, he's tweeting, not "sending her messages". I'm pretty sure he doesn't give a shit if she reads it or not. Second, as far as I've heard it's not "messages" (or, more accurately, "tweets"), but a single instance. Lastly, it's flawed because it presumes that posting an unsolicited tweet equates to bullying, and nothing has been presented to show that's the case.
Learn to ask more intelligent questions...
I've never seen a man defend another man with such intensity.
I bet you're the kind of guy that buys a sports jersey with another man's name on it.