These are fundamental differences. A good and generous person may feel they owe nothing to the weak save what they choose to give. That person is a natural supporter of the GOP. These are legitimate distinctions
We usually think of Faith in terms of Deities, but there can also be a Faith in Markets. Faith, by definition, is not amenable to discussion. If you believe the true duty of all men is to serve a particular deity, then your first political choice must be to support the Party closest to your deity. If you believe that Markets are infallible, then you must support a Party that shares your belief.
The chasm of Faith is a legitimate distinction between the GOP and the Democrats. Even religious Democrats tend to accept theological tolerance -- even when that tolerance is theologically inconsistent. The GOP has a much stronger claim to the Christian fundamentalist vote.
Tribe
Humans support their Tribe. It is especially hard for a member of a powerful Tribe to see its time is passing. The GOP is the Party of the White Tribe, and in particular of the White Male Tribe. The Democratic Party has a much blurrier Tribal identity, but if you're non-White or Gay or Lesbian it's a natural home.
The GOP and Dems are separated by chasms of Fact, Faith, Values and Tribe. The chasm of Fact seems easiest to cross, but often choices of Fact serve needs of Faith, Values and Tribe. Good persons, by reasons especially of Faith, Values and Tribe, may feel my party is less than sane.