That boy you judged for his looks?
Ya, his parents don't even remember him.

That boy you judged because he was poor?
Ya, he lost a brother to save the wizarding world.

That girl you judged for being different?
Ya, she lost her mother when she was nine.

That girl you judged for her buck teeth? 
Ya, she lost her parents for the wizarding world.

That boy you judged for having no family?
He lost the people he cared about most to save the wizarding world.