"Untouchability" is worst form of discrimination ever practized in human History. Indians Hindus did it to their countrymen.
In Contrast...
Islam was Caste Less
Islam was Identified with POWER Group
Islam treated everyone equal.
Now why does it not occur to you guys that stage was all set for big conversion from Hinduism to Islam. why do you igore this fact, and keep crying without evidence that FORCE led to conversion.