Well look at it this way:
#1: Christianity is not *that* big in China, and for a lot of them it was probably just another day. It's notable that on the holidays the casinos where I worked ran special deals on transport to bring in crowds of people from Chinatown on Christian/American holidays so the place was even more packed than usual (and also more crime ridden so it was nearly impossible for use security guys to get the day off).
#2: I am not a big fan of "open PVP games" for a lot of reasons, what you did was part of the game. Had that simply been a rival corp, that's pretty much what you do to them anyway.
#3: These guys ruin the enjoyment of the game for thousands of other players.
#4: China can't really be considered a friend of the US or even most of the West, and while totally microscopic you just struck a blow against their economy, albeit a tiny one.
#5: You really don't know much about their operation in the final equasion. It might have been a sweatshop operation, it might have been some kids doing a part time job after school, and it might have been a basement operation with a bunch of people doing it for their personal enrichment all on their own.
At any rate, while some of those reasons are better than others, the bottom line is that I don't consider their "conditions" to be an excuse for ruining the enjoyment of many other players. Sometimes you just do what you have to do.
Look at it this way, when you get past the propaganda of World War II, in order to win that war we pretty much bombed the living cr@p out of Germany's infrastructure. This involved decimating their food supply to starve them, and destroying every factory we could find. Those factories being operated not only by civilians, but captured allied prisoners who were doubtlessly praying for rescue but instead got bombed to death by their own people.
This is to say nothing of what we did to groups like the Volkssturm or Hitler Youth.
There is such a thing as a trade war, or economic war. Even if these guys were being held prisoner by the Triad or a local Tong, or had family members being held hostage, or whatever story some of these guys have told online, it still doesn't change the fact that they are destroying the economy in "our" bloody games. This is one way of getting them to knock it off. In theory I suppose some 11 year old might have gotten their head chopped off by gangsters because daddy didn't make enough ISK, but I really doubt it. But even IF that did happen by ruining the business think that you might be saving countless other 11 year olds since if you can make it so MMO currency farming isn't profitable they will stop trying to do this stuff.
Sadly nobody awards medals for messing with online farmers. For going above and beyond on Christmas you might even deserve one. Like the Roger Young of online currency wars. If such things were recognized you might've even had a real Space Soldier ship named after you in the far future.