Also remember, that fate in Mor Dohna predates 3.0 and the Au Ra. Trust me, discrepancies like that will most likely avoid retconning because it's a small, pre-expansion, over sight.

And you could rationalize it this way. It says the Gigas have contempt for the FIVE Races. Maybe they've seen how the Au Ra are unjustly discriminated against for no good reason and empathise with them.