Some people are fans of the Dallas Cowboys. But many, many more people are NOT fans of the Dallas Cowboys. This 2012 Deadspin NFL team preview is for those in the latter group. Read the other Why Your Team Sucks 2012 previews here. 1. YEEEEEEEEHAWWWW I AM FUCKING CRAZY! I covered the Cowboys for NBC for three years, and I think it's clear to anyone following the team that Jerry Jones is growing more and more out of it by the second. And I mean this in relative terms. The Double J has always been a raging, megalomaniacal nutcase. But now, as he edges closer to his 70th birthday, it appears as if he's completely coming off the hinges. There's the rapping. There's the "glory hole days" comment. Cowboys fans have loathed Jones's meddling for over two dec…