The "we didn't know" bit is eerily familiar and I will not expand. The other thing that came to mind was the 1971 Stanford Experiment (Zimbardo). It is ironical that this experiment would not be able to take place today, out of "ethical" considerations but that its real-life version is publicly funded and tacitly approved. All this is extremely frightening...
How could we have prosecuted the torturers but not the people giving the orders? Or, how could we prosecute the former vice president, but not the former commander in chief? Even though we are part of treaties that promise we will not torture, practical politics seems to be more powerful than the rule of law, and there would have had to be a much more overwhelming mandate.
Instead, it seems like we have forgiven people for commandeering the power we gave them for unlawful uses from one perspective[1], but the other perspective is that they did not do something wrong. Based on the rhetoric of this campaign it seems like timidity, instead of leading to some sort of reconciliation, has lead to the normalization of torture. Now even low caliber network television shows such as 24 and Madame Secretary have protagonists casually carrying out or ordering torture without the implicit condemnation that would have been written into the plot 20 years ago.
[1] Forgiving the breach of trust for misusing power you gave someone is of course different than the type of forgiveness actual victims could grant.