I've been linking the two for years ever since I first heard the term "denier". There are only two groups of people for which the word "denier" is used, Holocaust deniers and Global Warming deniers. If those who doubt the truth about 9-11 are called "truthers", not deniers.
I'll call everyone on it. ("I am a 'denier'? So you're calling me a 'Nazi', right? Herr Goebels would be proud of you.")