It's completely possible to question or dislike some of this guy's decisions and/or motives, and also be thankful of some of the things that he has revealed and the other disclosures that have followed (via government leaks) due to it. It's also not a contradiction to think that some of his leaks were useful to the American public and some were harmful. You can be glad at the outcome some of his actions have brought about (such as the increased knowledge we now have) without having to label him "a hero" and reserve your skepticism or judgement for other things he might do or will do.