The great thing about court records is that they are out there for all to see. I don't need to try to convince anyone that the founding leadership of the IPA did everything in their power to prevent the integration, and unification of all UPS pilots - I only need to point to these court records. Here are a few key excerpts from the US District Court in the Dorsey vs. UPS case (this is the original court ruling, which Dorsey lost largely based on the IPA's testimony regarding Class & Craft - Dorsey later won on appeal):

* After he (Dorsey) wrote to all Flight Qualified Supervisors about the efforts to gain union representation, the IPA informed Dorsey's group of its refusal to recognize the eligibility of Flight Qualified Supervisors.

* This is not a case in which the union is fighting to represent a group of workers over the objections of management. Instead this is an unusual case in which a sub-group of workers considered themselves entitled to union representation despite the union's lack of interest.

Don’t take my word for it. Here’s the link - take a moment to read it…. all of it.
DORSEY v. UNITED PARCEL SERVICE CO. | Leagle.com

So, you decide..... Did the founding leadership of the IPA desire an integration, and unification of all UPS pilots, or did they stand in total lockstep with UPS to halt Dorsey's integration attempt? I'll just leave it at this - no need for any more responses.