Why are women so mean to each other?

I personally love the woman that are girl's girl. Why do some of y'all so cruel to one another? Don't we have enough problems? We should be praising and uplifting one another. I understand insecurities but why would you want someone else to be insecure also?

Updates
7 mo
Wow. Apparently this question was rage bait. Lol. Or just summoned the women projecting their own insecurities.
Why are women so mean to each other?
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