In his book, The Dignity of Difference, first published in 2002, Sacks said that Israel's policies were incompatible with Judaism.
An Islamist subgroup – the Brigade of Islam – also claimed responsibility, but the two stories are not incompatible.
In fact, Israel's settlement activities are incompatible with a viable, reasonable peace agreement with the Palestinians.
incompatible in·com·pat·i·ble (ĭn'kəm-pāt'ə-bəl)
Incapable of associating or blending or of being associated or blended because of disharmony, incongruity, or antagonism.
Producing an undesirable effect when used in combination with a particular substance, as a medicine in combination with alcohol.
Not suitable for combination or administration because of immunological differences, as blood types.