A person's right to have these beliefs should be respected. They themselves should also respect that other people may find their beliefs utterly ludicrous, respect HAS to work 2 ways. It isn't particularly fair for a religious person to find atheism or agnosticism ignorant or disrespectful, and then for them to angrily respond to an atheist criticism of faith with "How dare you belittle my religion!" It HAS to, HAS TO work both ways.