Non-Muslims must pay a large tax.
Islam, while upholding balanced views in general, enjoins the most solicitous care for the weak and oppressed. The minorities, specially ‘The People of The Book’ are to be treated with justice in every way-in rights of property, in social rights, and in the right to opportunities of development. The non-Muslim living under the protection of a Muslim state is referred as Dhimmi, a free non-Muslim subject.
They are exempt from duties of Islam like military service and zakat, instead they are required to pay jizyah (poll-tax). Historically some Islamic governments paid this poll tax for poor non-Muslim subjects or reduced it to mere symbolic tax. If the State cannot protect those who paid jizyah, then the amount they paid is returned to them.
Islam guarantees full protection and security of the State including freedom of religion to all. The killing of innocent people is strictly prohibited, according to Qur’an: “..if anyone slew a person unless it be for murder or for spreading mischief in the land it would be as if he slew the life of all mankind: and if anyone saved a life it would be as if he saved the life of all mankind. Then although there came to them Our apostles with clear Signs yet even after that many of them continued to commit excesses in the land.”(Qur’an;5:32).
Narrated Abdullah bin Amr : The Prophet Muhammad (peace be upon him) said, “Whoever killed a Mu’ahid (a person who is granted the pledge of protection by the Muslims) shall not smell the fragrance of Paradise though its fragrance can be smelt at a distance of forty years (of traveling).”(Sahih Al-Bukhari Hadith:9.49).