The questions are different. Obviously they'd be less crazy without Breitbart and Infowars. As far as only getting their news from Fox, I really don't know. Depends on what percentage of Republicans read Breitbart/Infowars vs ones who supplement Fox with MSM sources, even if they're still generally conservative (like The Wall Street Journal or even The National Review or something). The second group would probably become more crazy if they only watched Fox.
I don't think there's too much overlap between the WSJ/National Review crowd and the Breitbart/Infowars crowd. Fox is kind of the middle ground buffer between the two. So like I said, WSJ/National Review crowd is more crazy with just Fox and the Breitbart/Infowars crowd is less crazy with just Fox.
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