There are about 189,000
The believers of Islam are called Muslims.
Malcolm X was an African-American who was a member of the Nation of Islam and called for a social revolution. It is worth noting that the members of the Nation of Islam Organization are not considered Muslims nor do they belong to mainstream Islam. Those members don't believe in the Quran, they call for racism, consider blacks to be superior to whites, and consider the leader of the NOI to be a prophet. These beliefs are against Islam's main teachings. No proper Muslim leader has called for social revolution.
When a Christian reverts to Islam they are called Muslims ;)
Islam holy land is called medina
Warriors for Islam are usually called Mujahedin (مجاهدين).
It has been written, 22,000 members. That number seems low to me.
The followers of Islam are called Muslims.
the five pillars of islam
No the sacred book of Islam is called The Holy Qur'an