The political group, the United Front for a Democratic Fiji, says the current leaders of the Melanesian Spearhead Group will be remembered for failing the people of Fiji at a time of need.
The UFDF has been strongly critical of other Melanesian governments which have embraced Fiji's military-led regime and supported its stewardship of the country.
The MSG, which includes Papua New Guinea, Solomon Islands and Vanuatu, is accused of ignoring the plight of Fiji's population, which for nearly seven years has been deprived of its democratic rights.
The UFDF co-ordinator, Mick Beddoes says it is outrageous that MSG leaders can endorse the use of armed intervention as a means of changing political direction.
"One can only conclude that between the lot of them, they don't have a spinal chord. But they should also know time is amazing, it's an amazing healer. And in time, there will be democracy, the chiefs will return, the people will take control of their country and how would they like the people of Fiji to remember their behaviour when we were in trouble?"