You can never tell what your actions will cause. A Catholic saint's desire to spread Christianity started a series of events that he would have no doubt greatly disapproved of. Yet, here we are. As a point of order, I want to clarify that gambling parlours weren't specifically run by Burakumin. Merely that those who are kept down by general society are more likely to find themselves profiting from 'anti-social' behaviour. I realize upon rewatching that it isn't clear in the video.