The 'right' thing to say in a situation like this, if one wanted to wow his date was that she had. Maybe. But Jack wasn't the type to change his politics over a woman. Even one that he cared for.
Even with Alice, he'd still stuck to the plan to overthrow the Queen. The good of the people had to be put before what he might want or need.
"Well, to be honest, I didn't have much time to form an opinion. I was caught off-guard, and I made a statement and I understand that it came off as a lot more against the League then I meant it to. I never thought that your group didn't want to do good. I was always just worried about others with abilities getting ideas. It just took me awhile to realize that if we could work something out for the City government and the Justice League to work in harmony, it would be better for everyone involved."