Costco review: Rude and unprofessional cashier

When I pay my stuff to cashier, the black guy (cashier) stack banana fruit on hot food, I remind him, he got mad and throw the banana in cart, and then throw the pine apple in the cart again.I told him, you should not do that, he response like robotic movement two times.I complaint to manager (Fred). My concern is the cashier is rude and not suit the cashier position.