Although I don't live in Thailand I've spent a lot of time there and I do permanently live in the region i.e. South East Asia and I can just tell you there is a deep underlying resentment towards westerners.
That's not to say that violence is common but it does happen and it seems to be at least more common in Thailand versus other parts of SE Asia. There have also been some other cases:
Sailors arrested in rape of French tourists in Thailand | New York Post