When some (supposed to be literate) humans believe that they belong to particular caste and carry it with their name, why should not some illeterate Tamilnadu people people believe that diseases are god given? They believe good/bad, disease/cure, etc are all given by God. That is the Hinduism that they believe in.
All of a sudden, when some racist say that Kshatriya Ram was the Hindu God and he would protect Brahmins and Cow from Ashuras (Claiming Tamilnadu people are Ashuras), you should be a real fool to expect TN believe that.
Kushbu entertained TN people more than Ram. and the Temple for Kushbu was an fun act by some youths. They won't protest if you build some industries over that temple. I can definitely assure you that.