David has a habit of screaming, "you idiot!" whenever his brother does something he doesn't like. which strategy for creating a supportive climate does his outburst violate?

I believe the answer is: Describe your own feelings rather than evaluate others.

This type of strategt is often initiated by people with poor communication ability.

Using this type of behavior would only resulted in resentment toward the other party without creating any chance for them to produce a certain compromise that benefit the both of them.