Every country has their own set of dumb people doing dumb stuff. Most everyone understands that and can separate them from everyone else in the country.
If there were 100+ locations, all burning multiple Qurans at each, then we'd have a massive surge in Islamic groups killing off people. However, we won't because there were only a few incidents yesterday by individuals - not groups.
In any event. It's that guy's freedom to do what he wants with his life. Don't worry over the small stuff. If you read the book of Revelations you already know how this is going to end.