Co-opting others is an age old tradition. Christists did it with Jews, calling their scriptures the "old testament." When that did not work, they tried the stick, going after Jews because Judas was one (not realizing that Jesus was also a Jew). Poobah did it by co-opting Moses, Jesus, and Abraham into the Kuran. Now these guys are co-opting Hindu scriptures. There is very little "new" in the New Testament or the Kuran.
