Their human leaders are the Mullah and the Ayatolla. Their god is Allah. Their prophet is Muhammad
No the sacred book of Islam is called The Holy Qur'an
Muhammad was the founder of Islam and the proclaimer of the Qurʾān, Islam's sacred scripture.
The sacred law of Islam is the Shariah law which has been compiled with reference and guidance form the Holy Quran and Hadith
yes
The revelations from Allah were collected and formed the Quran, the sacred text of Islam.
yes i think that the main sacred writing of Islam allow ploygamy
As any God religion, the religious leaders of Islam are good and knowledgeable.
Yes, Jerusalem one of Islam's holiest cities.
Islam's most sacred cities of Mecca and Medinah are in the Kingdom of Saudi Arabia.
Hajj provides almost all sacred experiences of Islam.
What is sacred to both are the Torah, Psalms, and the Old City of Jerusalem.
Islam is a religion not a spiritual leader. Islam is not dead.