Yes, in accordance with the US-Italy extradition treaty.
Yes, she should be imprisoned somewhere, but maybe in the US.
No, Americans shouldn't be extradited to foreign nations even if they're guilty.
No, she isn't guilty.
Surely the situation is analogous? Or do you believe Americans have some sort of divine right to be above the law?
Perhaps wiser advice is, "Don't murder people", potentially with an added "Especially in foreign countries."
2) I am an American. One of the purposes of government is to protect its citizens from the depredations or injustices of other governments or peoples. Italy has proven to me (someone with 3 decades of dealing with criminal appeals and due process and probable cause) that its handling of this case was grossly incompetent to the point that the interest in our government protecting one of its citizens trumps the desire of an incompetent and corrupt tribunal to continue to perpetrate a fraud in the name of justice
I agree with you that the US refusing to extradite some IRA members due to a very loose interpretation of what 'political refugee' means is pretty unstomachable. Equally, though, Britain flatly refuses to extradite murderers to the US unless the US promises not to go for the death penalty.
Those who are claiming a potential breakdown of the whole treaty system are simply being naive.
If, when defending your support for Donald Trump, and your response is,
"But but but... HILLARY!!!", then you lost the argument before you even began.