Rage can make anyone behave in that manner. But what I find surprising is that she read the Gita and in that I think Lord Krishna said something about why a person shouldn’t allow their rage take over or make decision when they are emotions are out of control.
This one I guess
In the Bhagvad Gita, Chapter 2 verses 62 and 63 the Lord says:
"When a man thinks of the objects, attachment to the object arises: from attachments desire is born; from desire anger rises; from anger comes delusion; from delusion the loss of memory; from loss of memory the destruction of discrimination; from destruction of discrimination a man perishes''.
Plus what happened to her reading out loud those verses?