Whatever be the case in TN or for tat matter any of four south Indian states ridiculed by Many Indian brothers, the fact of the matter is South India is the most developed region in the country as of now and the development work happening is also at much better pace than other parts. You guys continue killing each other in name of building temple and mosque..People down south have better things to do.
Look back into last fifty years and see the number of riots induced by some power mongering politicians and the brainless way in which mass followed their words and killed innocents, you will find which part of the country behaves in normal and human like manner.
As to the way politicians behave, for any example u quote from south I can say with supreme confidence tat a worse or at best equally disgraceful act wud have been committed in north as well.