Just like Christian denominations, most “Jews” are only genetically Jewish, they are not faithful, or as many of my Jewish friends tell me; “We are not practicing Jews.” Too many “Christians” are not practicing Christians either. In plainer words, both non-practicing Jews, and Christians in name only, are not followers of God, thus they are secular humanists practicing moral relativism, so they vote opposite of Godly morality.
Not that the GOP is a much better representation of Godly morality, where they have taken the “Christian” vote for granted as they capitulate to most all of the progressive left’s wretched ideology.
Yet when the totals for everyone that says they are Christian and not Catholic (Protestant), are all added up, the majority of the Protestant Christian vote, always goes Republican, except in 1932, barely, and in 1936, and 1964 in the assassination tidal wave.