The statement is not quite true. The Muslims claim that their heritage traces back to Abraham's first son, Ishmael, who was driven out of the camp with his mother, Hagar. God did not let them die in the desert but kept them safe.
"The statement is not quite true. The Muslims claim that their heritage traces back to Abraham's first son, Ishmael, who was driven out of the camp with his mother, Hagar. God did not let them die in the desert but kept them safe."
I believe Mohammed accepted the divine origin of the Old Testament. I believe he also referred to the Jews in the classic manner as "the people of the Book".
Surah 003.067 Ibrahim was not a Jew nor a Christian but he was (an) upright (man), a Muslim, and he was not one of the polytheists.