quick question on a hadith

[H.]

i have a quetion on this hadith

The woman who buries alive her new-born girl and the girl who is buried alive both will go to Hell. This tradition has also been transmitted by Ibn Mas’ud from the Prophet (May peace be upon him) to the same effect through a different chain of narrators.

Grade   : Sahih (Al-Albani)    
Reference    : Sunan Abi Dawud 4717
In-book reference    : Book 42, Hadith 122
English translation    : Book 41, Hadith 4699

why would a new born baby girl who is unjustkly killed by her parents go to hell?

[Sama]

http://www.ahlalhdeeth.com/vbe/forum/aqeedah-refutation-of-deviant-sects/17546-how-to-understand-hadith-of-buried-alive-infant-girls-going-to-hellfire