You mean they would not commit murder, rape, suiccide?
Why not?
They probably would commit such acts. What I'm saying though is that I don't think they would be bound by our idea of sin. The concept of sin is a human concept. The Bible and the laws within are intended for humans. I just don't see our concept being relevant to them.
Now, whether or not they have a similar concept, that is probable. But I just see no reason to impose our standards on a being they were not intended for. Especially since I'm sure they have their own standards.
In Latin America, many cultures practised human sacrifice.
From their cultural perspective this was virtue, not sin.
But for God - is it not sin to sacrifice a human being no matter what the cultural background is?
And when we talk about intelligent life again - would not God regard killing done by aliens as murder even if they don't see it this way?
But intelligent life from another planet is not human. Whatever God may have wanted for humans, or imposed on humans, would not be relevant to non-humans.
As far as we would know, God created his own set of standards for that intelligent life as well. So they would be bound by those standards, and not ours.