My DS is 9 and is a year into waiting for an autism diagnosis. He's what they would call high functioning. His brother is 7.
DS(9) has always seemed to take out his anxiety and stress from sensory overload on his brother. This doesn't usually involve any violence, mainly shouting at him to stop talking and strangely, he gets stressed over his safety.
For example, on the way to school in the morning he may be really stressing about how his shoes feel and crying about them and what he does is, get really anxious that his brother is walking near too the road and he shouts at him (and sometimes makes him cry) to walk near to the wall.
Today we went to McDonald's and he wasn't coping with the heat and the noise so we sat outside. DS(9) didn't put his hands over his ears about any other noise except the sound of his brothers voice and kept telling him to stop talking.
Why does he focus all this anxiety on his brother and is there a way to redirect this somehow?