It wouldn’t have been your fault, had you hit them. Bicycles are usually considered to be vehicles when being ridden. As such, they are generally not allowed to ride on sidewalks.
You had nothing to apologize for, they were most likely in the wrong. Their ignorance is not your fault.
I say this as a cyclist myself.
Thanks!
I do feel better.
But sure as I sit here, I would have ended up in court and paying to keep them in luxury for a few good years! That’s just the way it goes.
I used to cycle 6 miles to work at a hospital, past the airport in some major traffic. I respected the cars and never had a problem.
Those cars could hurt me bad.