The fundamentalists, also known as fundies or by their Latin classification Homo Phobius, are a subspecies of humanity distinguished by their phobia (simultaneous fear and hatred) of most people who differ from them in any way, based on their extreme religious conviction. The threat of eternal physical torture in the mythical flaming demon zoo known as "Hell" is the fundies' primary method of insulting others. They base this conviction on millenia-old books of badly-written tribal customs, myths and genealogy which have been mistranslated many times by other fundies. In the case of the Muslim fundie, these books are contained in the Qu'ran, while the Christian fundie worships the Bible.
The brain of the "Christian" fundie, while generally underdeveloped and often host of outlandish delusions, has a large capacity for memorization of Bible verses (or in the case of the Islamic fundie, Koran verses), often in the Shakespearian English of the King James Version, as this is less easily understood, and thus more easily twisted into the basic fundie message, which is "hate thy neighbor." Fundies, however, occasionally use the euphemism "love thy neighbor" (a rare example of non-literal fundie language) to convey the same idea.
Fundie dogma, along with what has already been mentioned, includes the concepts that differences between individuals, differences often so insignificant as to be unnoticeable without spying, should be the basis for undying hatred of those who possess any of these horrible differences, and for their condemnation to eternal Hellfire. This philosophy is also known as bigotry or douchebaggery. This is based on their occasional cursory reading of the above-mentioned texts combined with their lack of ability to understand the concepts of metaphor, sarcasm or any type of humor whatsoever. Often the fundie will not in fact read the "holy" texts, but will simply memorize the passages which other fundies recite. This is a common behavior pattern of the fundie, since, along with being often illiterate, they are incapable of logical thought, and thus cannot develop any individual opinions on the meaning of these texts. 
They are generally very stupid, a few are intelligent but just too frightened to think.
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Here’s a science fiction story about an alien called Xenu, I didn’t write it, someone called L. Ron Hubbard wrote it. Why is it important? All too often advertisements paid for by Scientology turn up on the Internet and some are obviously Scientology but others talk about Dianetics or just promise you ethical happiness etc without making the source clear. Well Scientology doesn’t look very ethical and many reasonable people say they’re more likely to empty your bank balance and make you less happy and less healthy than before. So if you find advertisements
pretending saying they’ll improve your life and it all looks too good to be true keep away.