Religion was used as an ideology as a system of control. When they forced the veil upon women they were using it as an instrument of control in the same way that in Mao's China people were wearing Mao jackets and women were not supposed to wear any makeup.
Basically fundamentalism is a modern phenomenon. In the same way that Hitler evoked a mythological religion of German purity and the glory of the past the Islamists use religion to evoke emotions and passions in people who have been oppressed for a long time in order to reach their purpose.
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All religions have periods in their history which are looked back to with retrospective fear and trembling as eras of persecution and each religion has its own book of martyrs.