We can't either.
Seriously, the liberalism that crept (or stampeded) into the American Church in the 1960s was premised on a misguided "compassion" that confused Jesus's teachings with communism, or at least socialism.
It is a “tribal thing” as described by one of my cousins. The feeling among many is that the Republicans are just to “mean” and don't support the poor. Suspect it goes back a lot farther than that, to the days when the only support the Irish immigrants could get was from the Dem machine bosses who used the gangs to control parts of New York.