2 things there:
1) They're God's words -
in your opinion. I don't agree with you. I think you have no way to demonstrate that. What we know for a fact is that they were words written by humans. And humans are wrong - a lot. Including humans who claim they speak for God. Whether that human had God whispering in his ear or not is up for debate.
2) Whether they're God's words or not doesn't actually explain why they're moral. Why does God have the view that two people of the same sex having sex is morally worse than say, genocide? Explain the moral reasoning there. If you don't have a good answer for that, then appealing to "they're God's words" is really just a cop out to shut down disagreement.
ETA: Posted this before I realized that
@ADigitalArtist made much the same set of points more succinctly.