DS has a extra curricular activity every Sunday and we have a WhatsApp group between the instructor and all parents.
The instructor communicated in the group that due to a local even one of the class need to be taken place on line but she cannot do it on that particular date. So she suggested to do it on Saturday instead. I replied that DS has other activities on Saturday so can't make it. Then the instructor continued the conversation with other parents that the class will be on Saturday. I feel being ignored. So I replied that we should only change the time of the class if all children can make it. Then suggested what time works for DS.
DH thinks that I am rude to reply like that. It ruined the relationship with this group because DS will be in the same class for the next few years.
AIBU to reply like that? WWYD?