How do you argue against blind faith?

Answer 1

Don't. Other people are perfectly entitled to hold their religious beliefs, just as you are entitled to hold yours. In a perfect world, everyone is free to hold any religious belief, no matter how irrational. If someone whose blind faith makes him or her feel obliged to convert you, simply explain that you have your own, personal beliefs which are different from his and that, since you do not wish to convert him, it is not a subject for conversation.