Answer:
1. Muhammad bin qasim was an Arab military commander of the Umayyad Caliphate who led the Muslim conquest of Sindh and Multan. Al-Hajjaj sent Muhammad Bin Qasim to attack Sindh as new arab allied with Al Hajj's opponent.
2. After the conquest, he adopted a conciliatory policy, asking for acceptance of Muslim rule by the natives in return for non-interference in their religious and cultural practices. He also established peace with a strong taxation system.
3. After the conquest of Sindh, Qasim adopted the Hanafi school of Sharia law which regarded Hindus, Buddhists and Jains as "dhimmis" and "People of the Book", allowing them religious freedom as long as they continued to pay the tax known as "jizya".
The word dhimmi literally means "protected person", referring to the state's obligation under sharia to protect the individual's life, property, as well as freedom of religion, in exchange for loyalty to the state and payment of the jizya tax, which complemented the zakat, or obligatory alms, paid by the Muslim subjects.
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