The fact is both Mr. Vayalar Ravi as well as his wife are practising Christians. Mr. Vayalar Ravi is aiming for Hindu votes as well as Christian votes. The Christian wife brings Christian votes. He pretends to be a Hindu, so that he can get Hindu votes.
Mr. Vayalar Ravi's main problem is that he should not be considered a Christian, and he should be considered a Hindu, so that he can get Hindu votes.
At the same time, he will practise Christianity, propagate Christianity and help insitutions propagating Cristianity, so that he can get Christian votes too.