It takes all kinds to make the world go round.
When someone is rude to me for no reason, I try not to take it personally. As you discovered you don't always know what kind of a day that person has had.
I love the majority of the people who work at Walmart.
I always smile and have my favorites I joke with. I try to go out of my way to make someone smile if at all possible.
I miss the fabric department our Walmart used to have. It's gone about 8 months now.