I'm just going to flat out disagree with this and say the players' responsibility should be playing to their max potential while they still can. Every scene has its ambassadors and emissaries who can pump up the world, but in the moment, the hardline competitors will do what they can to be the best, and to hell with all the rest. This has nothing to do with nationalism, it's just the realities of competition; some regions of the world do not have as big an advantage and have to try harder than others.
Aside from you, a onetime standout performance from Ketchup, and Tekken Master this past Evo, we have seen the best EU has to offer come and participate in stateside tournaments, only to eventually place below the US-based competitors. We can argue 'til the cows come home about whether or not the tourney performance is indicative of their actual skill, but these are the hard facts.
I agree that the US is far better suited to big tournaments, with easier travel and the benefit of speaking the same language. I also agree that the fanbase for the game is largely built in the US, being one of the few fighters truly made here. There are many advantages to being a US-based player vs a EU based player, just like there are advantages to being a Korean based player in Tekken, just like their are advantages to being a Japanese based player in Guilty Gear and Blazblue, just like there are advantages to being a Chinese or Mexican player in King of Fighters.
Every game has a bigger and badder scene than the other regions around the world, it does not make them special. If they do not get as many opportunities, that's too damn bad, but everyone grits their teeth and sucks it up and trains to be better than all the rest. Luckily, MKX has had a bevy of online events and representation on a far more international scale than we have ever had before.
Part of fighting game culture as we know it is making something of your skill when you have the opportunity, and this is where the EU, again, aside from a few choice standouts, hasn't made its mark. And yeah, people get roasted when they are not as good and the talk can be harsh, but again, this is the game you choose to play when you throw your hat into contention. Nothing is permanent in the FGC, and no one is irredeemable, but I think going after the players is a cheap way to ignore the realities of what's going on.