By Beauttah Omanga
The group claims the document is a threat to Kenyaâs unity, with Mr Rubia saying he is concerned that the country may plunge into turmoil in case the âYesâ side carries the day.
"Some people will not accept the results and that will be the situation since the document, as drafted, can never be challenged in any court," said Rubia.
He said the country would be more peaceful if the âNoâ camp wins "because we will have a chance to explain what we want changed and those in âYesâ will come on board and agree."
He said he was opposed to the document because it fell short of what he, Kenneth Matiba and Raila Odinga wanted in the early 1990s that saw them detained.
The veterans questioned President Kibakiâs role in fighting for a new constitution, recalling a famous statement he made during the Kanu days, saying attempting to bring about change was impossible.
They lashed out at lawyer Paul Muite and Imenti North MP Gitobu Imanyara, dismissing them as pretenders in the struggle for the second liberation.
"The two were brought on board merely for being lawyers by the real veterans who wanted publicity and legal representation," said Njeru Kathangu.
The group said it was wrong to claim that the second liberation heroes were only those supporting the current process.