Judaism theology doesn't believe in dualism of a god vs a satan, but Christianity believes in some sort of dualism between god and satan. [Spirituality & Religion]

I believe that the Jewish faith also holds there is a devil. Jesus was Jewish and He was tempted by Satan and told Satan to 'get behind Me'.

You would be surprised that believers of the Jewish religion acknowledge to presence of the devil. Check out scriptures of Genesis, Isaiah, Job And Ezekial to find the description of this fallen angel in the Old Testament

satan doesn't' have as much power as God. satan was created by God.

Free will.