Huh? Karunanidhi is an atheist, so technically he questions ALL religions, not just hinduism (though the case you mention pertains to hinduism, true). Anyway, nothing can be done. It's a US website, and US freespeech laws allow it (they make so much fun of Jesus, God and other christian figures, and this is protected under free speech). This is just a bunch of clowns trying to gain some free publicity as the protectors of hindutva.