Good joke.. so as per your logic, Jayalalitha, MGR , all are DMK.. Stop making comedy man... everyone knows that DMK refers to yellow towel leader and his hate agenda. MGR, Jayalalitha and Congress dont believe in ideology of MGR.
As for the caste thing (which you will anyway raise), TN was ruled by OBCs for 2800 years. British period was aberration. It came back to OBCs with Kamarajar and remained hence. Jaya's caste is not a matter, because she is part of sasikala family and sasikala family is OBC.
