Which characteristics of Muhammad Bin Qasim provided the foothold for the spread of Islam in the subcontinent

The characteristic of Muhammad Bin Qasim that provided the basis for the spread of Islam in the Indian subconscious was the permission of religious freedom.

Explanation:

Muhammad bin Qasim was an Islamic leader who, by invading the Indian subcontinent, did not impose the forced conversion of citizens to Islam. On the contrary, Muhammad bin Qasim presented himself very peacefully and even commanding a large army, he allowed religious freedom to be maintained, and those who chose to convert to Islam by their own free will would be welcome, but those who did not desiring conversion, could practice their religions without fear of reprisals.

a, both were musicians during the jazz age

the answer is mass marketing.