...neo-conservatives generally originated on the left side of the political spectrum and some times from the far left. Many neo-cons, such as Kristol himself, have Trotskyite roots that are still reflected in their polemical and organizational skills and ideological zeal.
Although a number of prominent Catholics are neo-conservatives, the movement remains predominantly Jewish, and the monthly journal that really defined neo-conservatism over the past 35 years, Commentary, is published by the American Jewish Committee. At the same time, however, neo-conservative attitudes have reflected a minority position within the US Jewish community as most Jews remain distinctly liberal in their political and foreign policy views.
Jim Lobe Asia Times August 13 2003