Resistance to Unions in America is pretty deep. This is a 150 year old issue that previously involved hiring consultants with guns to shoot at anyone who dared to ask for an 80 hour work week. I doubt that a crew of modern consultants did much more than run up some bills on a corporate expense account.

*Note that support/opposition to Unions is often form from petty core experiences (first hand and family relations). For me it is a contest between a 2 minute promotional video, three years of my professional life, and 25 years of my uncle's work experience. Given these forces, you would be pretty hard pressed to change my thoughts on the matter in the abstract (particulars are what matter here).