whether abraham is islam?

In the New Testament, Abraham is considered to be the father of all who believe in God. Christians believe that the promises made to Abraham have been fulfilled inJesus. The Koran, the holy book of Islam, says that Abraham, assisted by his son Ishmael, built the Kaaba, the shrine in the center of the Great Mosque in Mecca, Saudi Arabia. For the followers of Islam, the Kaaba is the most sacred place on Earth.