Leora doesn’t have a deep lying resentment for Malia, if that were the case Leora is powerful enough within RLC to get Malia either moved to another site or have her return home to Russia..
If you listened to the “ argument “ you may have discovered that it could well have been a matter of a loving friend trying to protect Malia from perhaps her own possible stupidity in a possible relationship.
Perhaps you are looking for something ( resentment ) that isn’t there, and the whole situation was a combination of different frustrations coming to a head.
Leora throws a tantrum but normally it is finished, forgiven and forgotten within 24 hours….As you have probably witnessed within the last couple of hours.