Religious Fundamentalism

Religious fundamentalism. One of the worlds worst epidemics.

Islamic extremism. It plagues the Middle East and parts of Africa, and occasionally even places as unrelated as the United Kingdom and the United States.

Christian fundamentalism. It plagues parts of Europe and North America, the majority being concentrated in the United States.

Jewish fundamentalism. It plagues the state of Israel, and parts of North America and Europe, strictly enforcing the will of the Torah, just as Bible thumpers attempt to enforce the will of Christianity.

There are only a couple of religions that extremism and fundamentalism are not rampant with those who carry the faith. These rare and widely unknown religions in Western culture exist majorly in Asia, most notably India.
Hinduism and Buddhism are the least outspoken religions in the entire world, and the only religions that have never resorted to violence to enforce their will.

There are plenty of other religions that try to force there beliefs on others, but very rarely use violence, such as Jehovah's Witnesses, Mormonism, and Scientology, but these have large downsides such as the fact that they're the most ridiculous religions in existence (well, possibly not Jehovah's Witnesses, due to the fact that I am in no position to make a judgement on them because I know very little of the Jehovah beliefs.
Mormonism, on the other hand, is based off the beliefs of a man who did all he could to hide what he had found by using ridiculously obvious excuses.
Scientology, is just plain ridiculous. It was created by a science fiction writer who claims aliens came from space in ships that look almost completely like Boeing 747's.
He then goes on to claim that the aliens souls where dropped into the volcanoes of Hawaii, where they rose from the lava to create humanity.
I mean, how absolutely far fetched and ridiculously stupid can you get?
Religion in general is a completely ridiculous human ideology, but a religion based off the beliefs of a renowned science fiction writer, that's one of the most ridiculous things I've ever heard of.