I think instead of rediff its our duty to censor them.. As far as things are good for the coutnry, the religion doesn't matter. As Sharukh Khan said in Chak De India -- "Waha kisis states ke naam nahin sunai dete hai... sunai deta hai to sirf ek naam I N D I A" I think you can extend it to religion as well.
As far as comments that hurts religious feelings are concerned, you can always report them as abuse and gradually that person wont be able to post anything with that login