It would seem that a productive first step would be for all US airlines (union and not) to put out a letter stating that if you work as a pilot for NAI, you will never be hired at a US major or regional carrier. I would hope no carrier would allow them to Jumpseat, but that should also be stated.
The letter should be distributed to every regional and flight school.
They are already planning on having the largest bases in the US for non-US based carriers. (Starting with FLL and NY)
Making hiring pilots from our country difficult to impossible should be one of our collective goals. We can take our own action without help from our worthless congress.
Just a thought.
I will personally treat any NAI pilot as a scab.