By Tzvi Machlin Despite interviewing for the Minnesota Vikings head coaching job, Jim Harbaugh returned to Michigan without an offer. But Colin Cowherd believes he knows why the Vikings didn’t offer him the job. On Thursday’s edition of The Herd, Cowherd suggested that Harbaugh wouldn’t gel with the Vikings front office. He believes that despite winning a lot of games for the team, he would ultimately clash with the general manager – as he did in San Francisco. “Jim Harbaugh didn’t get this job because he’s not as collaborative (with the front office), and I thought he had this job… That is so…