I believe even ALPA President Captain Prater stated that the final outcome of the combined carriers as planned would be like the Air Micronesia (?) - Continental scenario. Two certificates and one pilot group. Which was fine with Polar up until the "follow the flying" didn't happen for Polar. Then all of a sudden there was "no merger" from the Polar camp.
Yes, it will take a thinning of the ranks over time to get rid of the animosity.
The current arbitration being discussed is a further example of "getting mine" council mentality, forgetting those that originally lost jobs to the others benefit in the beginning.