Do you have a specific example of this? Every instance I have seen or heard about refers to the actions of Iraqi security forces.

hasn't had any adverse affect on the support for the war. It's proof that people just don't care.

At the risk of being mistaken for some kind of right-wing buffoon, I have to say that what I've gleaned from the Iraq war leak has had an adverse effect on my opposition to it. The sketch of what Iraq will be after the US withdraws is there and I'm not convinced it's any better. I still don't know what to do with that, but perhaps it's a sign of why many or most people don't care: there is no simple answer. That is, you can't just release a bunch of documents and end a war, because such documents will only give you a higher resolution picture of a complex reality.

I think that Wikileaks has sort of hobbled itself by relying on document bombs and overt political objectives instead of just focusing on sensemaking. They get a lot more attention this way, but much less capacity to change minds.

The need by governments to keep everything secret is a bit irrational. People don't care.

You're basing that on the mistaken assumption that the intent of all military secrecy is to withhold information from the citizens it serves and not enemies current and potential. The widespread appeal of that assumption is what WIkileaks depends on for donations but it's still bonkers.