Lou is rude to kids and fans tho
Louie is hard of hearing, it happened when he was a baby, in the crib. As a child he was behind because he didn't get his hearing loss diagnosed soon enough. It make communication hard. But he learned to read lips.
When he sees kids he's still traumatized from his own childhood, his natural reaction is to strike before they do.
So really he's not rude he's just socially inept due to his hearing loss making him stupid.
He's a modern day Hellen Keller.