The court in Greece also handed down a life sentence to Golden Dawn member Giorgos Roupakias for the murder of Pavlos Fyssas
Former MPs and a current Member of the European Parliament were convicted.
Refugees desperate to be moved might be tempted to burn down their camp.
Officials believe the fire was deliberately lit to protest a COVID-19 quarantine.
The fires were started during protests against a camp-wide coronavirus lockdown, according to one former resident.
A Somali refugee tested positive earlier this week in Greece's Moria camp.
Tensions between the two countries have risen amid a growing dispute over energy reserves in the eastern Mediterranean.
The government has slashed the period refugees can be sheltered in temporary accommodation from six months to 30 days.
Migrants and aid workers in Greece’s Moria migrant camp say residents are living in fear after the second fatal stabbing in recent weeks.
“If there is a positive case, it will trigger panic, and this panic will spread to the local population.”
Residents of the Moria refugee camp on the Greek island of Lesvos are living in fear under lockdown and a spate of vicious knife attacks.
Police are imposing 150-euro fines on people accused of breaking lockdown laws. The homeless have not been exempt.