State lawyers are well versed in state law. As this is a state case, involving state law, a Texas lawyer would be required to make knowledgable statements on the case. A lawyer of another state or country could likely recognize some similar language, but would not be well versed in Texas law.

This would be like someone commenting on a Java article by saying, "I'm not a programmer, let alone a Java programmer."

I didn't read any insult in his comment.

(Laws differ by state, so even a California lawyer might not know how a given law works in Texas, for example)