Edited sentence: " Other supporters of man-made global warming theory who have made this comparison include journalist Ellen Goodman and Green MEP Caroline Lucas.Sceptics have argued that the use of "denial" terminology is an attempt to delegitimise opposing viewpoints and that it trivialises the murder of six million people.. Retired professor John Brignell calls it "a cheap and quite despicable verbal reference to the Holocaust" and identifies it as one of a number of reasons why he feels global warming is more accurately described as a religion rather than science