Why did Lilandra support genocide of a Shi'ar enemy race but try to save another Shi'ar enemy race?
As I have recently re-read some issues of the Avengers: galactic Storm crossover that was about Kree/Shi'ar War.
Empress Lilandra was willing to give the order to launch the Nega Bomb that would reduce 98 percent of the Kree homeworld's population as mentioned in Genis-Vell issue 3.
But years later, she quickly opposed Emperor Vulcan's intention to commit genocide against M'kraan who renamed themselves after a Shi'ar word for "Death to Shi'ar".
They destroyed a Shi'ar colony by dropping a star onto them, yet and, without hestitation, she tried to stop Vulcan from wiping all of them out. This was the same leader who sent a Nega bomb to Hala and wiped nearly all the Kree.