You're getting that type of reaction from him because the posts telling him what he's doing wrong or did wrong are mostly exagerated and flat out wrong. Telling him he's stalking her by texting her for a relatively small period of time trying to figure out why the hell she isn't answering for example. If you want to show a person where they were wrong, you don't make up bullshit, or say things that are using a horribly incorrect point of view.
For example: The whole text involving the "I know where you are" thing. Alt, knowing where she was because facebook is far from stalking. Texting her that was overkill though, and frankly a little bit creepy.