DoUgIe says a lot of stuff, most of which is irrelevant to the rest of the world.
What he doesn't say is that foreign investment in domestic airlines could possibly result in his being out of a job.
Imagine being a money guy or girl from, let's say...the UK. You're a pretty astute individual, and you pay attention to how the airline you have a financial stake in is being run. Now, you may only have 25% of the voting shares in the airline, but your the money (wo)man!, which means you can pretty much tell the rest of the board what you'd like to see done. If you own 50% of the stock, you probably won't have a very hard time drumming up support for your position.
For instance, if you see that labor morale is low because contract talks have slowed to a snail's pace, and you believe happy labor = profitable airline, then maybe you might consider replacing the CEO with someone who thinks your way.
The way I see it, anyone who's going to put that much money into an airline won't need or want to cut deals with outside investors hawking credit cards or looking for product placement inside aircraft cabins. Coalition building suddenly becomes unnecessary. And if you're a CEO who depends on having investment allies to fall back on in case you need to make a quick exit from a foundering business, you might find your options have decreased dramatically.
So, ask yourself what US airline CEO's are most afraid of when it comes to foreign investment. Your conclusions may vary, but I have a feeling there will be some startling similarities to my argument.