It didn't draw much more money in the US past the first 6 weeks (it started dropping screens). It's made around $14million more in the US in the 5 weeks SINCE.
Also, $100million @ $8.00 a ticket (these are often art theaters and they don't discount tickets much and can run higher) is around 12.5million people. That is a fringe. Rush Limbaugh has more listeners.
While I undoubtedly agree with you as to the truthfulness and accuracy of this film, any movie that sets a new record for documentary box office should not be sneered at as irrelevant.