Islam in general refers to the religion which God Almighty sent His Prophets to teach mankind: The worship of the One God alone (pure Monotheism) while submitting to God's will in gratitude for being given life and innumerable blessings.
Does Islam Tolerate Other Beliefs?
"God forbids you not, with regards to those who fight you not for [your] faith nor drive you out of your homes, from dealing kindly and justly with them; for God loveth those who are just." (Qur'an 60:8)
It is one function of Islamic law to protect the privileged status of minorities, and this is why non-Muslim places of worship have flourished all over the Islamic world.
History provides many examples of Muslim tolerance towards other faiths: when the caliph Omar entered Jerusalem in the year 634, Islam granted freedom of worship to all religious communities in the city.
Islamic law also permits non-Muslim minorities to set up their own courts, which implement family laws drawn up by the minorities themselves.
When the caliph Omar took Jerusalem from the Byzantines, he insisted on entering the city with only a small number of his companions. Proclaiming to the inhabitants that their lives and property were safe, and that their places of worship would never be taken from them, he asked the Christian patriarch Sophronius to accompany him on a visit to all the holy places.
The Patriarch invited him to pray in the Church of the Holy Sepulchre, but he preferred to pray outside its gates, saying that if he accepted, later generations of Muslims might use his action as an excuse to turn it into a mosque.