“We’re in a conflict in two countries out there right now,” he added. “We have to be incredibly thoughtful about the potential of in fact getting into a conflict with a third country in that part of the world.”
Keep in mind that that is from the New York Times, so it has dubious credibility.
Given the civilian command structure of our military, I have a hard time believing that any current Chairman of the Joint Chiefs would take a position on whether we should attack a certain country or not.
When they print a retraction, saying this was not a real quote, you let me know. Otherwise, it stands as what the man said. The chairman of the Joint Chiefs doesn't want us to invade or bomb Iran, that's pretty clear.
You say you don’t believe he said this? They have a link to the press conference; click it and see for yourself.