Fundamentalist Christians Statement Of Faith is an excellent representation and is already posted for this area to give people a good idea about what a Fundamentalist is.
There is nothing wild or unreasonable about being a Fundamentalist. I must add that a Fundamentalist is not a Legalist, and this is contrary to the opinion of many.
Let me be blunt: many calling themselves Christians are more conformed to the world than they are to God's Word. This is a very broad statement, but for one, involves the teachings and traditions of men versus what the Bible clearly teaches. Going back to the Bible as the Sole Authority is uncomfortable for many, so they use making fun of fundamentalists as a defensive mechanism. Men wanting to be the authority instead of God is at the root of the problem.
Many are so used to adding to or taking away from the Bible that they don't want to be reminded about what the Bible teaches. So, it's more handy to call fundamentalist names or disassociate themselves from fundamentalists. I must add that some of the posts in this area bear little or no resemblance to fundamentalism. Many people have a preconceived notion of what a fundamentalist is based on stereotypical junk. If one really wants to know what a fundamentalist is, read
Fundamentalist Christians Statement Of Faith.