Not easy to pull the Thais in in large numbers, but if he can, then fair enough. Gotta mention though that you're going to have to deal with the mentally ill and criminals at some point here, even if just to get rid of them, if you open a bar or restaurant. They aren't confined just to Pattaya etc. What was he expecting? Walton-on-the-Barrow?
However, slagging people off is probably not the best way to go about it, even if he's semi right, sounds a bit sanctimonious. It's Up to him though, it's his business.