Guardian: Oxfam and WWF International, two of the world’s largest and most conservative western climate change campaigning groups, have been forced to apologise profusely after an investigation found them guilty of what amounted to diplomatic terrorism: smashing Saudi Arabia’s official UN nameplate and stuffing the pieces down a lavatory. The incident, which took place in June at the last global climate talks in Bonn, followed mounting anger by NGOs at what they interpreted as continual …