Judaism is the source of most of The Bible (the Christians call the Jewish-accepted portions "the Old Testament"), the origin of the concept of Messiah is from Judaism, both are monotheistic religions, and Jesus himself was Jewish and was learned of Jewish traditions and laws--he was a rabbi.
The Bible influenced the three religions of Christianity, Islam and Judaism.
Christianity and Islam ^^
Christianity. Islam was also heavily influenced by Judaism.
Christianity and Islam.
Judaism
AnswerCertainly, Judaism influenced both Christianity and Islam - they have their roots in Judaism. Some say that Zoroastrianism also had a considerable influence on both religions, both directly and indirectly, through its influence on Judaism.
Abraham founded Judaism. Christianity and Islam are daughter-religions of Judaism.See also the Related Links.Link: How Abraham founded JudaismLink: Was Islam's inception influenced by Judaism
Christianity grew out of Judaism. The founders of Christianity were all Jewish.Another answer:Furthermore, Christianity was slightly influenced by Zoroastrianism and Pagan Graeco-Roman religions.
The concept of monotheism was a revolutionary idea that influenced Judaism and Christianity.
Christianity and Judaism
Islam, Judaism and Christianity.
The Pope has called Judaism "Christianity's older sister," since Christianity bases much of its content on Judaism.