It's definitely one of the main bases for Christianity and Islam, although Christians and Muslims are loath to admit as much.
For the real "cradle" of religion you have to go back to Prue-history. The concept of "God" probably evolved from the totem, which was a sort of magical image of the object of the hunt, on the success of which latter the life of the tribe depended. Eventually he became the Being who would ensure a successful crop, or the vanquishing of enemies; today he's been reduced to an excuse for Christian schoolchildren to get out of their biology homework.
Judaism and Hinduism predate Zorastrianism, which was founded only in the sixth century B.C. It is a dualistic religion in which Ahura Mazda is worshiped, whereas Hinduism is polytheistic and Judaism in monotheistic. Christianity is aware of its beliefs (and its picture of the devil as being red and having horns and a tail) but Christians do not accept those beliefs except as popular misconceptions. Zorastrianism was created in Iran. The expression "cradle of civilization" (rather than "cradle of all religions") refers geographically to Iraq, not to one of its neighbor's (i.e., Iran's) religions.
No. the Prophet Zoroaster appears to have lived in about 1200 B.C. Religion had been around for a long time before that. The Egyptain and Sumerian religions had been practiced for a long time before the advent of Zoroaster. Although n OT much is known about the religious practices of the Indus Valley civilization, it is evident that they were practicing some kind of religion. And although nothing much is known about the religious practices of Stone Age man in Europe, the massive stone monument erected, like Stonehenge, Avebury, and the multitude of sites in Brittany, were most probably built for ritual purposes.