I think you are confusing confidentiality vs the right to discuss public information. Confidential information can be for example the medical history of someone who may be unfairly disadvantaged by it's disclosure.
In this case we were discussing publicly available information about the Greens, who are putting themselves forward as leaders of the country. Suppression of such information may be done for political reasons rather than reasons of confidentiality.
This information is not confidential as they released it to the public themselves :)
