The links you provided prove that Hasan is indeed controversial. However, as the fact check provided above by user anthw shows us, the term extremist is incredibly nebulous and means different things to different people. To claim someone is an extremist is inherently politcal and driven by personal belief. I disagree with your use of the "True" label for this reason. Senators, and publications calling someone an extremist doesn't make it so. Your post itself isn't misleading, I just think that labeling this claim as "True" instead of " Can't be True or False" was a mistake.