Protestantism is part a type of Christianity, though Christianity and Islam are in some ways, similar. The main difference is about Jesus (Muslims believe is a prophet, not the Son of God, like in Christianity). Protestantism believes in simplicity and, in some ways, so does Islam. However, Muslim mosques are quite elaborate, whereas in Protestantism, they are very plain.
I'd have to say Christianity for certain and with the rise of Islam, then Islam is number two.
Christianity, Islam, Judiasm
No date is known because there is no real schism in Islam. There is no schism in Islam in the sense as known in Christianity. In Christianity, there are many denominations and different churches and different ritual worships. However, in Islam, differences between the two main Islamic groups, Shiites and Sunnis, are within minor details and minor differences in interpretations of Quran and Prophet Muhammad Sunnah (sayings and practices). Refer to question below for more information.
Islam and Christianity
Christianity and Islam
Islam and Christianity.
Islam and christianity.
Christianity Hinduism and Islam
There was no schism in Islam to know when it was started. There is no schism in Islam in the sense as known in Christianity. In Christianity, there are many denominations and different churches and different ritual worships. However, in Islam, differences between the two main Islamic groups, Shiites and Sunnis, are within minor details and minor differences in interpretations of Quran and Prophet Muhammad Sunnah (sayings and practices). Refer to question below for more information.
Judaism, Christianity and Islam
Christianity and Islam.