He wasn't exactly pleased about the situation himself. Far from it, in fact. There was a lot that could have been said about his feelings as far as Lex Luthor were concerned, but now was neither the time nor place to go about discussing them.
"It doesn't matter what he's doing," he told her sternly, "it's ending. And it's ending now." Squinting off toward the building, he scanned the first floor for a back entrance. Upon finding it, he looked to Kara and said, "Through the back. Let's try to avoid being seen. I don't want to have to physically put anyone out right now." He'd prefer to avoid the violence.