By calling Karunanidhi as vazhum valluvar (living valluvar), they are insulting Tamils as a whole. valluvar was a great saint above all caste and creed and he was one of finest moral and ethical preachers of Asia.
Karunanidhi cant stand to be even the hair of Valluvar. Let DMK people worship him like anything, please dont even try to compare with Valuvar, who was above race and party.
PS - Valluvar was a great Tamil Poet, who preached lot of ethics and said that God is the starting point of world