JUST like any expert in their fields stick to it's funadamentals like a good Dcotors sticks to ethics and fundamentals of medcine , simialry a good Muslim followes the Fundamentals of Islam as it's fundamentals are so simple and clear , other people are in state of confusions regarding their fundamentals going on to become fanatics or extremists

"Islamic Fundamentalism" is a term coined by the western media which have coined this term to depict the groups who are active in spreading their religion by exerting power...and also stick to the rules and doctrines of their religion strictly.....

No idea but, for your sake, I have done some research. You might get your answer here. Please don't thank. Glad to be of help

Source: http://www.muslimphilosophy.com/ip/rep/H007.htm

Islamic fundamentalism is a term used to describe religious ideologies seen as advocating a return to the "fundamentals" of Islam: the Quran and the Sunnah.

According to dictionary meaning of fundamentalism is:strict adherence to any set of basic ideas or principles: the fundamentalism of the extreme conservatives.

There is no concept of "Fundamentalism" in Islam. The western media has coined this term to brand those Muslims who wish to return to the basic fundamental principles of Islam and mould their lives accordingly. Islam is a religion of moderation and a practicing God fearing Muslim can neither be a fanatic nor an extremist.