He's pleased that she answers him openly and honestly, even if it is a mild frustration for her to be defying him just as openly and honestly. He's pleased that she has thought about this carefully, and that she's able to think for herself. The problem is perhaps that he feels her thoughts might - despite all this - be tainted. That is to say, he has associated himself with other gods and goddesses who are almost universally mistrusted. Most of them with good reason, but for now, he needs their strength. He and those others in his pantheon - forced to the outskirts not due to their deeds, but by the encroachment of other power-grasping pantheons - deal with the problems they present when he gets past the problems the others present. The unfortunate thing is that if Izzy is learning about her powers and her identity through the children of those gods who have alienated and oppressed their pantheon, she's likely to have a very erroneous view of his actions.
He sighs, expression softening a little, and pushes away from the counter, tucking his hands into the pockets of his jeans. Yes, he is wearing a sport jacket, button down shirt, and jeans with a big, fancy belt buckle. He walks away from her towards the end of the room, surveying the decor there, or just looking out the window (provided there is one there to look out of), before tilting his head back. "Do you believe that I am truly out to hurt others? Isabelle, do you understand why we are considered 'outsiders'? Do you really understand, or have you only heard it from books written by the children of other pantheons - or from those children's very mouths?"