I imagine that your colorblindness keeps you out of the air industry because aircraft extensively use red and green lights as markers. Green for the right side, red for the left...and airport runways also use these lights...etc etc etc. I'm not entirely familiar with how everything works on the tarmac, but I imagine that some critical functions involve noticing the differences in color of various lights on the airplanes or the equipment....
...so it's not really that they're rejecting you as a person...it's just that they want absolutely ZERO chance of anything bad possibly accidentally happening. So it's more of a zero-tolerance safety issue than a personal rejection, IMHO. It's not like they fired you because they don't like you as a person.
I'm so sorry that you have to deal with all of this...
But maybe you could still find a way to be a part of the aircraft industry. A factory job doesn't sound super awesome, but maybe you would find it fun to be able climb all over a 767, doing the wiring or welding or something....I dunno.
I know it seems like the world has conspired to ruin your plans for yourself....but really, I think that's something that everyone has to deal with, to different degrees. I may not be colorblind, but there are certain things that I want to do with my life that just can't happen, for one reason or another....so the best I can do is look for ways to do what I enjoy doing...or get as close to it as possible. All of that was sorta rambly...but I hope some of it helps, Zak.
*lightly chucks Zak on the shoulder* Keep on going, man. I think you're an awesome dude....and I believe you can find something that you'll love doing with your life.
----Steve