I've found the smoking gun:
https://www.theguardian.com/media/2011/sep/02/wikileaks-publishes-cache-unredact...WikiLeaks publishes full cache of unredacted cables
This article is more than 12 years old
Former media partners condemn WikiLeaks' decision
to make public documents identifying activists and whistleblowers.
WikiLeaks has published its full archive of 251,000 secret US diplomatic cables, without redactions, potentially exposing thousands of individuals named in the documents to detention, harm or putting their lives in danger.
The move has been strongly condemned by the five previous media partners – the Guardian, New York Times, El Pais, Der Spiegel and Le Monde – who have worked with WikiLeaks publishing carefully selected and redacted documents.
"We deplore the decision of WikiLeaks to publish the unredacted state department cables, which may put sources at risk," the organisations said in a joint statement.
"Our previous dealings with WikiLeaks were on the clear basis that we would only publish cables which had been subjected to a thorough joint editing and clearance process. We will continue to defend our previous collaborative publishing endeavour. We cannot defend the needless publication of the complete data – indeed, we are united in condemning it.
"The decision to publish by Julian Assange was his, and his alone."
Diplomats, governments, human rights charities and media organisations had urged WikiLeaks's founder, Assange, not to publish the full cache of cables without careful source protection.
The newly published archive contains more than 1,000 cables identifying individual activists; several thousand labelled with a tag used by the US to mark sources it believes could be placed in danger; and more than 150 specifically mentioning whistleblowers.