Religious exclusivism

Religious exclusivism is the belief that only one religion is right and all other religions are wrong. It's like there can only be one correct answer to a math problem - if your answer is wrong, it doesn't mean the other answer is right, it just means your answer was wrong. With religious exclusivism, it means that if your religion is wrong, it doesn't mean that any other religion is right - it just means that yours is wrong. So, the idea is that if one religion is wrong, that means all the other religions must be wrong, too.