hibiscusfire:
Muslims and Christians do not have the same God.
For starters ....Allah did not have a son. Jehovah God the Father has a Son ...our Lord Jesus Christ of Nazareth.
That alone can tell you the difference.
Next, Christians believe in the Trinity, muslims do not believe in anything like that.
You've got a point. The Muslim god, alone and unchanging is much more like YHWH, the god of the Old Testament than is the triune god invented by Christians. Jews and Muslims both reject the idea of their god having a son (and ludicrously, being his own son) so in that aspect at least the Christian god is quite different from the Muslim and Jewish gods, despite originating from the same source.