If is the operative word here.
When I was a kid and went in 1950's to an integrated school in Chicago there was abuse hurled because of the following but not usually racial:
1. Skinny kids.
2. Big eared kids.
3. Dumb kids.
I suggest Barry was #3.
“the young Obama, then known as Barry, dodges rocks thrown at him by Indonesian children who also hurl racist insults at the boy”
Projectiles were just not up to the job, BLNT.