We're all human, aren't we? Every human life is worth the same, and worth saving.
Indifference and neglect often do much more damage than outright dislike.
"One can never have enough socks," said Dumbledore. "Another Christmas has come and gone and I didn't get a single pair. People will insist on giving me books."
He can run faster than Severus Snape confronted with shampoo.