Why did my coworkers give me the cold shoulder for missing work and the kids holiday performance?

I got sick last Wednesday and I think my coworkers are upset because I was unable to be at the Christmas holiday show. We’ll I could not get people sick. Two days later I got better and I said I felt bad for not being there. One of my coworkers said, “Yeah I bet you did.”
The other one got silent and said, “Well we were counting on you to be there to help the kids with the holiday show but it all worked out so it’s fine. Wow…. way to make me feel better. I thought they would say, “No it isn’t your fault. Don’t feel bad.” I think they were upset with me that I wasn’t there. I did tell the admin and my team that I wasn’t going to mine about to come in because I was sick. It felt like they gave me the cold shoulder. I know we rehearsed for weeks and to get the kids ready.
We’re on break now and I apologized again for not being about to make it…. no response. At least they’re honest but they didn’t have to be so blunt about it.

Why did my coworkers give me the cold shoulder for missing work and the kids holiday performance?
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