What do you mean by"sufficient"? If you mean enough evidence to cause any reasonable person to accept the hypothesis, I'm not sure that anysingle historical example can do that.

(I think the invasion of Iraq was a really bad idea and was "sold" to coalition countries' people on the basis of cynical lies, and I do think enraging your enemies is generally unwise, so I'm not saying this out of general ideological opposition. But I think you're way overstating your case here.)

[EDITED to fix a really bad typo: I had "engaging" where I meant "enraging" in the previous paragraph.]