Well the old adage is when you are in a hole, stop digging. Someone though has not told Joe Bast, the head of the Heartland Institute.

Poor old Joe is feeling rather sorry that at his time of need his colleagues are deserting him. In a recent blog he criticises one such colleague saying that rather than “speaking up for me and The Heartland Institute” you are “abandoning us in this moment of need.”

Written on the eve of its latest denier-fest in Chicago, Bast’s outrageous blog shows he is still not only in denial about climate change, but he is still trying to denigrate his critics. He is also still trying to twist the truth.

He argues that “for 28 years, The Heartland Institute has tried to stay “above the fray,” producing “high-quality research and commentary and staying focused on the issues, even as the political dialogue became more and more polarized and corrosive”.

But he forgets to mention that the Heartland has done more than most to polarise and corrode the debate on climate change.

All you have to do is look at the speaker line up for the Chicago conference to see that this is not a conference intended to forward the debate on climate, it is just promoting the views on known sceptics.

Bast then says: “We rely on research and reason, not rhetoric and emotion, and still do.”

Coming from someone who likens the vast majority of the world’s climate scientists to murderers this sounds a bit hollow.

Bast does finally admit that his billboard was “in poor taste and a mistake”.

This could have been a perfect opportunity for him and the Heartland to offer a mea culpa moment, apologise and say it would turn down its rhetoric and truly promote a balanced view.

Instead Bast accuses climate scientist Michael Mann and Bill McKibben from 350.org as “madmen”.

He then goes on to say that he stands for “truth and honesty”.

For Bast the truth may make difficult reading:

Finally after years of disinformation and denial about climate change, as I blogged last week, eleven organisations have deserted him since the organisation posted its stupendously naïve and stupid billboard likening those who believe in climate change to mass murderers.

Over the last few weeks, Heartland has lost at least $825,000 in expected funds for 2012.

This equates to over 35% of the funds it planned to raise from corporate donors, according to Forecast the Facts.

As the Guardian reports this morning: “Heartland’s financial future is also threatened by an exodus of corporate donors as well as key members of staff.”

The list of conference sponsors of the latest denial-meeting has shrunk by half from the 2010 meeting.

“It’s haemorrhaging,” Kert Davies, research director of Greenpeace, told the Guardian: “Heartland’s true colours finally came through, and now people are jumping ship in quick order.”