Reread your original post. There is a degree of anger resonating. If this is what these people were feeling off you at that time then that would explain their reactions.

Consider how both you and they were communicating. Specifically what were the non-verbal communications that would have added context. "Calm down" might have had far less of an impact dependent upon the non-verbal cues.

Now ask yourself of your expectations. What did you expect in those situations and what likely did these individuals expect of you? It sounds to as though these weren't the same. Was it possible though there could have been some common ground? Might there be in future interractions?

I agree, it certainly doesn't sound very friendly or professional. But could context have anything to do with their ultimate message.