Amos you're right. Climategate happened three weeks before the Copenhagen summit, and the media hysteria basically sabotaged the summit. as you pointed out, the scientists have since been found to be right. see report from Michael Moore's site

Strangely the global media which sprayed outrage at the seeming implications of leaked emails has been remarkably backwards in coming forwards about the British House of Commons select committee, that reported in March that the scientific reputation of Professor Jones and the CRU remained intact.

Those leaked emails effectively turned public opinion backwards, and meanwhile governments are not acting.