I started by stating the obvious: Christians worship Yahweh, the Trinity, whereas Muslims worship Allah, a monad. This is not an incidental difference; Islam makes every effort to condemn the Trinity as blasphemy (4.171). The Quran rejects the relational aspects of God, saying that he is not a father (5.18) and he is not a son (112.3). It establishes its own doctrine of God, tawhid, in diametric opposition to the Trinity, and that doctrine becomes the central doctrine of Islamic theology.
