The rabbis to whom you made reference have spent their entire
lives immersed in the study of the Jewish scriptures as well as
other sacred Jewish literature and were, therefore, not "astounded"
by the Judaism that was taught in Buffalo that evening, as you
were.
Why weren't the rabbis stunned by these Jewish teachings on
Satan? Because the Hebrew scriptures explicitly declare that the
Almighty Himself places both the good and the evil that He created
before mankind in order to provide His prime creation with free
will. Deuteronomy 30:15
states,
See, I [God] have set before thee this day life and good, and death
and evil.
In Isaiah 45:7, the prophet describes
God's creation plan when he reports that,
I form the light, and create darkness; I make peace, and create
evil; I the Lord do all these things.
(Icemoon's comments: THIS SOUND LIKE THE
VERSE QUOTED BY SIS!! 
)
I did not invent these verses, nor did I tamper with them. In fact,
the Bible I used in the above quotations is the King James
Version, which is a translation that could hardly be
construed as friendly to the Jewish faith.
These edifying verses underscore the fundamental
biblical teaching that it is the perfect spiritual balance of good
and evil in the world that confronts every searching soul. This is
the Almighty's divine sovereign plan for creation:
It is through man's personal decision to turn away from evil and
choose good that virtue can be attained.
Isaiah 45:7 and Deuteronomy 30:15, however, pose a serious
theological problem for Christians who maintain that God
did not create Satan, the angel of evil. According to Christian
doctrine, Satan was the highest-ranking angel who, through his own
act of spiritual defiance and outright disobedience, became the
chief adversary and slanderer of God and the embodiment of evil in
this world. In Christian theology God never created evil; He is
only the author of righteousness and perfection, as you maintained
in your question. Therefore, God could never create something as
sinister as the devil himself. Rather, Satan's unyielding
wickedness is the result of his own spiritual rebellion.
