Well, God/Allah punishes anywhom that takes a life, as so, these parents will burn in Hell, and no, because 1 makes a mistake, you shouldn't do another to pay it back.
It's really sad to see all this hate.

Only God Can Judge Me
الله فقط يمكنه محاكمتي

I am you and you are me, if you love i love, if you suffer i suffer
أنا أنت, و أنت أنا, إذا أحببت نفسك أحببت نفسي, إذا عانيتَ عانيتُ