Tolerance is the act of accepting other people. Squeaky is tolerant where others are not because she accepts Raymond for who he is.
Squeaky is very protective of her older mentally disabled brother, but it can still be draining for her.
All I have to do in life is mind my brother Raymond, which is enough.
Raymond “needs looking after cause he’s not quite right” and that job falls to Squeaky, even though she is younger than Raymond. The only thing Squeaky does not have tolerance for is people who are mean to her brother. She does not much care for braggarts either.
“You got anything to say to my brother, you say it to me, Mary Louise Williams of Raggedy Town, Baltimore.”
When Squeaky wins the race, she is more excited about the fact that Raymond is running than the fact that she won. She does not care at all that he stole her thunder. She is proud of him for being a runner in the family tradition.