Anybody who would deny anybody a ride just because of who they work for is basically a horrible person.
Well you are dodging the true issues by making it something it's not. This isn't just "hey, I don't like xxx airline, no ride for you." It's more like "the overwhelming majority of your pilots laid the framework for the destruction if my career and livelihood"
I personally hate jumpseat wars, or the threat of it. With that being said, don't try and diminish the responsibility that PSA pilots do play in this.