Why do some people believe 911 was an inside job?

Seriously how can people be so stupid as to think 911 was an inside job when there's absolutely no evidence to support such a ridiculous claim and all the retarded conspiracy theories about 911 being an inside job have been debunked so many times. 911 inside jobbers sure are a special kind of stupid!

Why do some people believe 911 was an inside job?
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