British Airways and Iberia disagree with the rest of the airlines of Europe over complaints about the 3 big Gulf carriers (their parent company is ~ 10% owned by Qatar, and prior to that BA sponsored Qatar into oneworld).
Of course BA and Iberia are joint business venture partners with American who is a prime driver of complaints.
Etihad has big ownership stakes in several European carriers, and Emirates is a huge Airbus operator which just signed a nearly $10 billion deal for new European engines. Things get even more complicated still..