to get pissed off when my brother tells my son off

[R2G]

My son is a toddler. My brother yells at his kids at the top of his voice. he scared my nephew (his son) so much last week shouting because he threw a toy across the floor that my nephew scratched at his own face in frustration.
Ifeel I am perfectly capable of looking after my son, my brother clearly thinks he is a spoilt brat. Here's the example from tonight
Mum was looking after my son while I worked. Got there at 6.30pm. Just saying it was time for a bath and my mum brought out some chocolates (a present from my sister just back off holiday). My son has one with my niece (brother's daughter) and then he gets another without asking. I say put it back and ask nanny. He throws a fit kicking and screaming on the floor. I just make sure he is safe and try to ignore just saying things like come on it's bath time in a minute don't spoil things when you have been so good.
In my mind and experience of the days I work, when I get there he is tired and sometimes a bit attention seeking in the sense he hasnt seen me all day so good or bad he wants my attention.
My brother comes in from the other room (watching telly only ever comes in to bloody bellow) and yells at my son to get up and quit it. I say I am sat right here next to DS thank you and he is very tired please dont yell at him. Brother making comments like 'well someone had to take charge he is getting out of control, he obviously is allowed to behave like this at home'. When he is calm I say ask nanny nicely and share with your cousin. he is 2 and a half so says 'please i want it' Brotehr starts mumbling 'oh that's a lovely way to ask isnt it is noone going to teach him any manners either'.
Fed up of him. What to do and AIBU? I think I am a patient mother and he is an impatient arse who ignores his kids (when we are at my mums) only to come and yell when things get out of hand.
AIBU?

YANBU. your brother sounds like a bit of a twat!

I would be annoyed in both instances. I think the manners thing is all about grandstanding as a parent - 'look at me! Aren't I superior!' using your child as prob. V annoying.

YANBU he is two thats what two year olds do

ignore your brother.

I don't think it's ever acceptable for someone to talk to a child that age in that way so I don't think you are being over sensitive at all - in fact it made me feel really sad for your DS. It would have been slightly more understandable if it was your brother who had asked him a question and he then wanted your DS to say please, but his whole approach sounds too aggressive and unnecessary.

The whole issue of 'commenting' on another child's behaviour, for want of a better expression, is fraught with differences of opinion, but basically I think that even if something is irritating I would be able to put up with that more easily than something I thought would scare my child. That is where I would draw the line.

thanks all
mabanana that's how it came across. Look at me and my wonderful children (they are but they have their faults) I will teach you how to have one just like them.
Yes but you have a bunch of little girls and I have a crazy little two year old boy and that's how I like him thank you very much!!
Feel a bit better I just still unclear how to handle it/put a stop to it.