The West Papua National Coalition for Liberation says the credibility and integrity of the Melanesian Spearhead Group is at stake as its leaders are due to meet in Fiji next week.
The Coalition says allowing Asian Indonesia instead of Melanesian West Papua to sit at the table is in clear breach of the constitution and foundation principles of democracy and Melanesian solidarity.
It says if the MSG can accept New Caledonia's Melanesian Kanaks to become members and not the French colonial government, it is not logical to create a reverse situation by inviting Indonesia as a colonial power controlling Melanesian West Papua.
The Coalition says by allowing Fiji's Commodore Frank Banimarama and his counterpart from Indonesia to control the MSG, the organistaion will self-destruct.
It is also critical of what it calls the attempt of two military dictatorships to control Melanesian democratic countries.