In fact, reality is not apparently basically rational. Why does anything exist at all? Surely, the trivial solution would be a simpler state of affairs. Why is existence not nothing forever? Why there exists anything instead of nothing (let alone you and me, in particular) does not stand to reason.
A lot of it boils down to abortion. When you see abortion as baby murder, it would take an awful lot to offset that moral significance. In other words, many who support Trump wouldn’t exactly condone rape, corruption, etc, but they feel abortion is a much larger moral issue.