The Democratic Party itself sits to the far left and has favored the liberal position for the last 100 years. Most of the people you hear about in Hollywood are extremely well off and are close to if not part of the 1% of the population (elite). Entertainment as an industry is the epitome of the belief and idealism of social equality -- no matter where you come from, you can achieve and be successful. The Democratic Party has favored laborers and labor unions. The unions in general serve all the members, not just the 1%. It's the ones who are not headliners that this negotiation is for. They have rights and the union is there to protect those rights.
Studios and unions are run by people. Being selfish and greedy is an individual thing and can be on both sides of any issue and situation. It's called free will, and each individual has days where they are not a very good human. Most of them don't live in a bubble and they are aware of the world -- they still live and die in it same as the rest of us.
The world isn't as it was in 1939. Yes it would have been easier to have had the support like there was in WWII. I've listened to both sides and people believe they are correct and are very passionate about it...extrememly so. But yes, we are fighting at a disadvantage and it is costing as you say.
As for China, that country has its own problems and will continue to have its own growing pains for it is deeply confused and conflicted. The USA has a lot of foreign money invested here, be it China, Dubai, or India. The USA is a good investment and will continue to be. Mexico -- I wouldn't want to live there either, but its part of the world. The USA is part of the world. China is part of the world. All are components of one economy. There are good times and tumultuous times, but there will never be perfection. Last time I checked, we were all human. But we aren't very good to each other that much is for sure. But I'm not giving up on anyone.