Pretty much all airlines prefer, if possible, to get their u/s aircraft back to a main base.
If the a/c in question had landed at Brescia and the snag had turned out to be a bit more serious and say required an engine change, the costs and more importantly time involved in getting a repair team together and down to the aircraft can be considerable.
Whilst you may feel that the customer was inconvenienced - say that a part was needed - if the aircraft returns to main base the sapres are available and the aircraft can be put back into service as quick as possible (hopefully in time for the next service) - if a part is needed at an outstation, the delay in getting the spares and maintenance crew out may mean that the aircraft is out of service for the whole day.
So you can see that by returning to main base the greater majority of customers are helped by protecting the integrity of the operation.