Does the phrase "The holocaust was a unique event in history for two reasons:" mean that the following two reasons will individually cause uniqueness or will in conjunction cause the uniqueness? Here is the phrase in context:
Fackenheim argued that the holocaust was a unique event in history for two reasons: (1) The Nazis persecuted the Jews not because of their religious beliefs or practices as in former times, but strictly because of their genetic makeup. (2) The demonic will of persecutors to exterminate the Jews superseded their aims at winning the War.
I feel as though both must be in conjunction to be unique as it is not the first time in history that people have been persecuted because of genes (black people have been persecuted for that reason). Therefore the author must either be wrong or the two reasons must be in conjunction to be unique.