As it appears on our currency, God refers to Yahweh. There are probably well over a billion people on this planet that would take offense over your claiming that Allah is Yahweh. A greater portion of them would verbally confront you. A good portion of them would physically assault you. And another portion would leave you dead.
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And an even fewer portion that know who God in our currency refers to. God is God is God. It's another word for God.