{Nier:Automata} Adam& Eve + Human (family love)

I, Akane, on a Hot Sunny day while laying on the sand has realised, the world I had vaguely remembered is in complete and utter...what is that word again? Destruction.
Remembered...remember what? I've tried vigorously to remember what I am and where I'm from, just anything at all, but, the only thing I remember was a name, a single name 'Akane' so I'm assuming this is my name.

I was scared at first in an unfamiliar place alone, suddenly I was discovered by these kind 'machines' residing in this desert region, they were willing to save me stating that I was a 'child' I lived with them for a year in a peaceful state, it appears that they are now my 'family'. However it didn't last long at the end of the year, 2 'androids' had turned up discussing that their captain has been notified, a human, that were extinct for over 1000yrs was sighted in this sandy area, what is this human that they are talking about? What am I seeing, they just started attacking the kind machines that took care of me, what did the machines ever do to them?

I do not get it we were here first, we were living happily just fine, what gives them the right to waltz in here and start killing them?