Why is conservatism and hypocrisy so inextricably linked?

It is not xenophobic or "racist" to fear fundamentalist Christians. Their holy book teaches them not to love their neighbor but to convert that neighbor and impose the medieval system of oppression known as Christianity. 

Let' s say that the fundamentalists are a small minority of right wing evangelicals. 

Why do they always quote their holy book, the Bible, when they do the most heinous acts you could ever imagine? Murdering doctors, wiping out entire cultures and ethnic groups, hanging and imprisoning homosexuals, and wiping their religions and languages from the earth all in the name of Christianity!