I don't think he says that people that move out west are negative. It's the people that keep "threatening" to move because something isn't going their way here.

That could also be just empty rhetoric and I'm more concerned about the comments he makes in the final paragraph. He brands himself as a "positive" person with an underlying assumption that if you have a problem with him or disagree with him, you are a "negative" person. However, perhaps he's learned his lesson and we should give him the benefit of the doubt and let his constituents judge him. It certainly will make an interesting case study on how politicians approach social media.