I believe that the Concept of Christianity as promulgated by the
Gospels was a Conspiracy of a group of Jews living in Israel at that
time.
Reason:  All players involved were Jewish.
Has anyone written a BOOK on such a theory?   If so - what is the title and
name of the author?     Hans Leistina    (Les Dyna)

While I do not believe you are historically correct, Friedrich
Nietzsche is the most popular promulgater of this theory in his book
The Geneaology of Morals.  Echoes of it are also found in Beyond Good
and Evil.

Note that some people consider this to be ironic on Nietzsche's part,
and most modern academics consider his conjecture false.

Those Jews must have been REALLY good  to find someone that fulfilled
over 600 prophecies that had existed in the Jewish Holy books in
existence at the time. Right throughout his life, from his birth to
his death and all points in between, for over thirty years, he
FULFILLED THOSE PROPHECIES. And the last one being about his clothes
being auctioned, and not having any bones broken and being pierced in
his side. All in the one day. And all to get away from Jewry and start
a new religion called CHRISTIANITY. A thinking person putting all the
facts together would see that this one person was responsible for the
change from Jewry to Christianity. Even the Jews themselves were
expecting his arrival. People changed because of him, he was not the
result of a conspiracy of Jews in his day. The Jewish holy books are
now known as the Old Testament, the beginning of the Bible, and the
man`s name was Jesus. HE taught us how we should live.

Please do not reply to this message because I'm a person of reason and
do not wish to debate (so if you are reasonable, then you may ask
questions--please no comments, otherwise please do not contact me).

Christianity did in fact originate with the Jews.  In fact, according
to Scripture (including Old and New Testaments), TRUE Jews and
"Gentile" Christians are of the same tree.  Jesus himself was a Jew. 
The authors of three of the four gospels were Jewish, and all the
other authors of Scripture (Old and N. Testaments) were Jewish (those
authors who lived prior to Israel/Jacob were Jewish figuratively but
not literally).

What actually happened is that the Jewish Christians of the period
immediately following Christ's death, etc., broke away from the
Judaism that was concentrated in the Pharasaic and Sadducean parties
of the Jewish nation.

I would go into more detail without a price, but I don't want to if
there will be no enduring fruit.  Again, please no comments, questions
are OK.  Bye now.