Excluded from bday party - aibu to text the parent?

[RealReginaPhalange]

Reception. Its Feb so kids know each other well enough. Bday party tomorrow, idk how many not invited and how many invited but my son has been excluded. They do play together at school but i dont know the mum. They had chats today about party tmrw, my DS feels he is invited and he is fully aware of the party. Apparently invitations went out by whatsapp directly. I am on whatsapp group so it is not an error. Fine not to invite everyone but in reception? They dont have own little circles of friends yet. Invite everyone or no one at that age. And then talks at school and some kids end up upset. I am so so angry now and will need to have a chat with ds. should i text the mom it is hurtful or should i leave it?

just to add. I dont really know parents there and not sure if she is well known, i am worried i will be a gossip no 1 afterward and it would lead to my ds being excluded more.

aibu - dont text
not aibu - text

Can never understand such angry and vitriolic reactions to someone you don't even know and who has no impact on you. People feel differently than you do. Don't let it affect you so much that you start being unkind.

Am not sure if this has been covered an old but relevant topic - I have seen kids excluded from birthday parties it my school too - it is upsetting, what ethnicity is your child ? Sadly kids are forgotten or parents not in what’s app groups due to other factors - one Down syndrome child in one class whole class is invited apart from her - the mum is in tears. I have seen certain ethnic groups not invited - sadly symptomatic of what is happening in society.