Is Raiders' front office too dysfunctional for some coaching candidates?

Daily Raiders blog for NBC Bay Area website: Raiders owner Mark Davis disputes one report that says some head-coaching candidates are put off by the way front office functions. http://www.nbcbayarea.com/news/sports/Raiders-Mark-Davis-Disputes-Report-that-Some-Coaching-Candidates-Have-Issues-With-Team-288052621.html