That is unprofesional and unfair comment which sounds like a political biased insane judge toward MA-60 even though you got know that it is ATR-600!
Fair point. At this stage we don't know whether technical issues, or indeed anything to do with the specific aircraft type, were implicated in the accident..
As for the wider issue of the MA-60's safety, it's worth bearing in mind what the NZ government has said on the subject, in advice to travellers to Tonga:
"Tonga’s domestic airline fleet currently includes an MA-60 aircraft. This aircraft has been involved in a significant number of accidents in the last few years. The MA-60 is not certified to fly in New Zealand or other comparable jurisdictions and would not be allowed to do so without a thorough certification process under Civil Aviation rules. Travellers utilising the MA-60 do so at their own risk."
NZ government travel advisory - Tonga