There are many pieces of evidence, it's not helpful to speak of the strongest one.
Then please summarize the best evidence for your claim.
Also, please answer my question: Do you dispute that peoples' accounts of their own motivations are generally unreliable?
. Here's one typical example, a link from a prominent book that shows that there were a number of newspaper articles expressing outrage over the bombings that made de-nazification more difficult.
Can you please quote the relevant part of your source? I did not see what you were talking about.
Yes, I dispute the statement that peoples' accounts of their own motivations are generally unreliable.
It's the sentence ending in footnote 22.
Here's my op-ed that uses long-term orientation, probabilistic thinking, numeracy, consider the alternative, reaching our actual goals, avoiding intuitive emotional reactions and attention bias, and other rationality techniques to suggest more rational responses to the Paris attacks and the ISIS threat. It's published in the Sunday edition of The Plain Dealer, a major newspaper (16th in the US). This is part of my broader project, Intentional Insights, of conveying rational thinking, including about politics, to a broad audience to raise the sanity waterline.