<human>: Can you condense the text into a few key points?

This past year was my first time in retail. As it was approaching Christmas time, everyone was saying either "Happy Holidays" or "Merry Christmas". I'm Jewish, so obviously I don't celebrate Christmas, but I don't mind if people say it to me. Fast forward a couple weeks before Christmas. A couple comes in, and as they're leaving, they say "Merry Christmas". I reply with a smile, and "thanks, have a nice day!" I didn't think anything of it at all. However, an hour later, I get a call at the store from those customers. They called to say they saw my Star of David necklace, and to apologize for saying Merry Christmas. They said they were followers of Christ, but that they realize not everyone is, and that they should have said "Happy Holidays" instead. They said they hoped I wasn't offended, and to have a nice day. 

I was totally taken back, but I was so thrilled that there is at least a *few* decent people in this world, especially those who are retail customers.
<bot>: I work in retail. People said "merry christmas", noticed my Star of David necklace, called back an hour later and apologized.