You clearly have no idea what life with a serious criminal record is like if you think she’s going to be able to just pick up where she left off when she gets out (nevermind the lost 8 years).
Don’t get me wrong, what she did was fucked up, but an eye for an eye makes the whole world blind, and it sounds like the only sentence you’d have been happy with is more or less life in prison. She didn’t set out to kill this lady, even in the heat of the moment. It’s beyond fucked up to shove an old lady in any case, and every single day of those 8 years is well earned, but I don’t agree that it’s light.
As a society we need to get over this idea that the goal of prison is to punish the perpetrators. The point should be to rehabilitate them so that when they get out they can be decent law abiding, productive members of society. A person rotting in prison for the rest of their life does nothing but waste tax dollars and cause misery. A person rehabilitated can go on to make the world a tiny bit better, and maybe even help someone else from going down the same fucked up path she did.
Its a fact that countries whose prison systems are centered around rehabilitation have lower repeat offender rates