I didnt criticise you for not backing up your opinions, i criticised you for repeating yourself without adding new information.
All statements of what is fact is an opinion about what is a fact and what is not. The more evidince you provide the more convincing that opinion may to others that jt is correct. But its still an opinion, and nothing wrong with that. Generally people state opinions as fact when it is an opinion about so ething being a fact, as we are doing.