forget about it, dont need to 斤斤計較 about that 2個中國藉家長.
But as a chinese parent in that school, I will feel very shameful as a chinese, their behaviout will just let the 外國人 think 中國parent very "攪屎"(滾). If kids are really sick or feeling unwell, shcool will call the parent la, no chance for them to stand there and guess who or who is sick.
向學校o既主任投訴 - they are really "chi q 線", they should go to 青山, short short day.
If I am u, I will call that 2 中國藉家長 and the 主任 to 還我清白 and should say sorry to me and the kid infornt of other parent and kid.