Ahlul Bayt News Agency, Former prisoner lashed out at the repot by the Royal United Services Institute after it warned that prisons are radicalizing Muslims and therefore promoting home-grown terrorist attacks.
The report claims that Britain should be on higher alert than any other Western country from home-grown terrorists.
Danny Afzal, the former inmate, now works as a researcher for the prison reform trust.
Afzal categorically dismissed the report's claims, warning that it would create major challenges inside and out of prisons.
He said: "I'm very disappointed by this scaremongering report. All the hard work to improve faith relations inside and out of prison are severely jeopardized by reports such as this.
"When so-called experts publish these misleading figures they never think of the consequences for Muslims and their families, who will be isolated as a result.
"The report is based on unreliable secondary evidence.
"I've visited prisons first hand and spoken to enough Muslims there to know that the report's 'facts' are unfounded."
Afzal added that decent resettlement will prevent future acts of terrorism.
Civil rights group Liberty policy director Isabella Sankey said: "What is crucial is society's response. Terrorism feeds on fear, division and disenchantment."
The government's independent reviewer of terrorism legislation Lord Carlile said the issue is more about crime than Islam and Muslims.
"We should not be surprised that when we send very young men to prison, particularly for short prison sentences, they become targets for greater crime," he said.
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