Because they are being sued in the US over conduct that happened in the US? It’s really not very difficult or special. They can of course choose to ignore the

Because they are being sued in the US over conduct that happened in the US? It’s really not very difficult or special. They can of course choose to ignore the lawsuit, if their principals want to never enter the US again, which is frankly recommended for all their employees given their operations are prima facie criminal in nature.