Are atheists not people ? I made the effort to watch Mr. Zakir Naik's lectures (had to give up after two, he sounds too much like a used car salesman) and all he does is claim that the Bible and Koran are compatible. But that has never been in dispute they are part of the same Abrahamic tradition. The remaining content is along the lines of "how many angels can fit on a pin head", meaningless drivel. Finding common ground between Hinduism and Islam is fundamentally impossible. Hinduism tolerates and encourages pluralism and is technically superset of Islam, however this leads to a paradox since Islam claims their way is the only way and that there is no other path. Anyway the last comment was meant to illustrate your time will be better spent in reading the Upanishads and using the critical insights learned there to examine your own belief system.