Religious extremism tends to a state of mind of a person about his religion in which he has such firm belief on his concepts such that any negotiation from it is unbearable for him. He becomes aggressive towards the society. As not only he considers himself to follow the religion strictly in his way but wants the society to do so. If unfortunately someone refuses his thoughts, he can go to any limit to make that person acting upon his ideology. He can even commit the murder of disobedient person.
Militancy is aggressiveness irrespective of religion, race, nationality and language. A militant is not always a religious extremist as in the case of Tamil Tigers in Sari-Lanka. But a religious extremist is always a militant.
Religious extremism is found in various religions of the world. Unfortunately the propaganda is against Islam only. But the study of history provides the fact that extremists are found everywhere not only in Islam.
For instance, Christians have extremists in themselves too. Catholics and Protestants are two major religious groups in Christianity. They are so rigid that a protestant even can't think of marrying a catholic christian.
Hinduism contains vast example of religious extremism. Brahmans are the most noble group among Hindus while Shudders are the lowest. Shudders are treated worst than even animals. Even if a shudder hears the Holy voice of a Brahman, he is punished by pouring melt lead in his ears. He even can't walk over the shadow of Brahman.
Jewish are considered as most rigid and extremists on their religion. Crusade wars were fought due to their extremism. They were Almighty's favorite nation earlier. So, they suppose themselves beyond any law of the world. they even don't consider any nation equal to them.
Likewise religious extremism is found in Islam too. There are many reasons behind it. If we study the world history, it is clear that Muslim nation has been a victim of distinct