This I never understood.
According to Pew research regarding U.S. Jewish political affiliation: "68% of Jews by religion and 77% of Jews of no religion identify with or lean toward the Democratic Party; 26% of U.S. Jews overall identify with the Republican Party."
U.S. Jews, both religious and non-religious - are predominately liberal/progressives.
It should be noted that use of the term "religious" does not mean Orthodox; only that a person adheres to some form of Judaism. The same Pew research tells us that - "57% of Orthodox Jews describe themselves as Republicans or say they lean toward the Republican Party, while 36% are Democrats or lean Democratic."