Even more interesting Momoe from the English translation. The aircraft had just rotated and so its forward surfaces and engines would feel the impact of the birds at about V2 velocity. The engines suffered typical bird ingestion damage and if the aircraft had been a prop jet, then some bird parts might have been centrifuged towards the side of the fuselage and these then might have had enough energy to cause deformation in a cargo door area; birds ricocheting off the nose landing gear might have hit the lower fuselage but IMHO I don't see birds having enough tangential speed of there own to cause the cargo door handle to misplace.
The replies from those BM's, whom I take it as having operated A320 cargo doors, seem to point to the bird impact being secondary to the door lever being in the wrong positioned.
Perhaps a BM could advise how obvious the ECAM message alerts the crew, when it was obviously open to the Tower?