How is “you do you, boo” a personal insult??

Mod “sully” deleted my comment and banned me for posting “you do you, boo” because it’s an insult but I don’t see how that’s even possible.

Here’s the definition
You do you, Boo
Similar to “whatever floats your boat” or “if that’s your cup of tea,” but with more of an supportive tone.
https://www.urbandictionary.com/define.php?term=You%20do%20you%20boo

thanks