If Thiruvalluvar had written in Sanskrit, and were perceived as "brahminical", would he be revered as much in TN, regardless of his content?
For all we know he may have been a migrant from the north, or even a brahmin - but a key reason for his popularity is that his social identity remains unclear
Labels matter. Identity matters. When you wish to proselytize
Eg: Would Deng Xiao Peng have had popular support for his market reforms if he were a University of Chicago educated English speaking Chinese American?
Perhaps not