If I am being convinced in any belief, that is called brainwashing. I firmly believe that the only truth is the one the self is creating. So, after all, it should be no factor or debates that convince anyone, but only the self. Many of the people lose their religion and faith because it is not theirs. We are all born in one community or another, and only when we start asking questions, we become free to discover the truth. That may be life after death, God, spiritual plane, anything that heart is communicating to us.