"deal makers don't make emotional decisions."
But subtle deal makers can think past the current deal. They may be willing to accept short term pain for long term gain. If, by buying Airbus, enough of a storm was created by Boeing and its lobbyists a similar situation might be preveneted in the future.
But if you are saying that UAE might purchase Airbus for reasons outside the economics of the deal (such as counteraction by Boeing and its lobbyists)...I think you are making a very clever point, but it seems like a stretch.