We can parse the various (correct or incorrect) statements for ever. The fact is that the photo in question was indeed presented in a misleading way by the media and the peculiarity of British libel law was apllied.
Also your use use of Hitler analogy is disingenuous - you could "prove" any accusation of genocide that way.
The idiots ate their words.
And don't you worry your little head about anybody proving something - as soon as a burden of proof is met, you can just move the goalposts and act like you don't understand the first thing about anything.