Yes, they are Fundamentalist Moslems.
The taliban strictly enforced Islamic religious laws.
The Taliban is an extremist fringe of Islam. To give you an idea, I once heard it said that the Taliban is to Islam what the Ku Klux Klan is to Christianity.
Taliban
The Taliban are religious extremists who believe people must behave in a very specific way in order to please god.
The Taliban.
Because they were all a bunch of religious fanatics who did not care about preserving history.
I can't speak for what may be in your book, but the Taliban impose strict religious beliefs on the people they control. They would frequently beat women if limbs or faces were showing, and would publicly execute people for religious crimes.
The Taliban.
The problem with the Taliban is they hold a very extreme view of Islam, and they try to impose it on everyone, even those who might not share that view. For example, Islam does NOT say women cannot study, nor does it say women cannot go to school. But the Taliban are opposed to women going to school, and have burned down schools and even attacked female students. Further, the Taliban have expressed their opposition to popular music, and do not want any kind of popular culture (including television programs) to be broadcast; they believe only religious studies are permitted. Some Afghans, fed up with corrupt local governments, at first supported the Taliban, because people believed the Taliban would be honest, since they were very religious. But the Taliban proved to be eager to hold on to power, and willing to kill those who opposed them.
The Taliban fighters primarily adhere to Sunni Islam, specifically following a strict interpretation of the Hanafi school of thought. Their beliefs are heavily influenced by a fundamentalist interpretation of Islamic teachings, which they use to justify their actions and governance. The Taliban also incorporates cultural and tribal practices into their ideology, which can sometimes intersect with their religious beliefs.
He the leader of the Taliban, he organized and trained those that are in the Taliban
Taliban is not shia. Taliban members are Wahhabi which is a sunni sect. there is not relation between shia and Taliban.