Not a Catholic, so my vote means bupkis, but where I grew up, one does not run down the reputation of the dead. If she was indeed the evil, corrupt person the individual above made her out to be, then history will record her as such. The vast majority of the population prefer the myth to the reality, "Mother" Teresa was a little old woman who liked to help people.
Sometimes the myth is better for people than the reality.
The modern "reality" that so many intellectuals want everyone to accept is that there is no God, no such thing as Absolute Good or Absolute evil. That there is no existence after this life, this is it, one shot then you are less than dust in the wind.