Blowing hot and cold, DMK president M Karunanidhi extended an olive branch to the Congress offering to “forgive” and support it after the elections. Pouring scorn on Congress, its former ally DMK on Wednesday charged it with adopting “vengeful methods” against the Dravidian party and called it “ungrateful”. But suddenly he softened his tone when he said, “If the Congressmen express regret and get back to their secular credentials, DMK will support them and is ready to fogive them”.