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I get that the main jist of what Maher is trying to point out is that many people that believe in a certain religions are convinced that others that don't believe in their god can't be a moral person just for the sake of morality. They firmly believe that they have the only true way to be a good person in their teachings. Remember the so-called Moral Majority? There were a few hypocrites in that bunch. Even worse, some of the more extreme religious sects have some beliefs that require them to act in a decidedly immoral fashion such as jihadists and the "eye-for-an-eye" crowd such as Christians that back the death penalty. The big problem is that so many feel it's their mission from their god that they convert all non-believers by any means necessary, including violence and domination.