Why is she mad?

So there a little situation at work where I have found a coworker has been saying she stalks my IG and has been calling me names and saying disrespectful comments about me.

She happened to find out somebody told me and came screaming at me and told me to keep her out my mouth when in fact she is the one talking about me and saying disrespectful stuff I don't understand why is she mad when in fact she is the one talking about me.
Why is she mad?
Why is she mad?
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