I think that the whole God conversation isn't t to be taken much seriously. He says "I'm not a God. At least not yet" and he just smiles. We haven't been given any glimpse into how he can gain God status or that he really have such an ambition.

When he's interrogated by Galadriel, he speaks with both awe and respect about Iluvatar and the Flame Imperishable. Really not what an Uruk with a God complex would say.

The talk with Halbrand leaves many things open to interpretation, in my opinion. First, he gives him a surprised, almost shocked look, as if he's sensing that there's something wrong with him.

The women and children part seems to be said with a hint of irony and that he's the one who lost a woman and a child or children. Maybe to Sauron.