That is the key, what parts are actual fact and what parts are actual opinion. Fact is the climate is changing, is it an opinion that the cause is Human output. This is where data is used and models to prove this point but, when researching this topic you will see that both sides have their data models to prove their point. Who's data is correct. Most layman will not know the difference or even be able to understand the concepts and because of that each side will just pick the model that support their bias.
Take CORVID, as your example its contagious which is fact, the theory part comes into play is the Preventive methods used are they effective. This is not fact but based on educated opinion and there is a lot of opinion on what is effective or not. Just take the issue with mask, when CORVID was first talked about from Fauci and the CDC, they stated mask were not effective but changed that stance once more data came out about the virus. Multiple doctors have chimed in and though the majority still state that mask are effective, there is no definitive scientific data proving it is one way or another. This is why we get conflicting information from different doctors. Also the issue is that you get multiple people in the medical industry chiming in on the topic which also muddies the water because most laymen will just pick the opinion that follow their bias.
Its the details that everyone will look at when basing their opinion on a subject. The bigger picture to you may not be the big picture for them and this goes toward perspective.
You genuinely don't have any clue how science works, do you? Like, you don't understand how things are researched, tested, hypothesized, and iterated upon to get the latest and most accurate readings in order to best understand the world around us.
These things you discuss, they're not opinions. They're poor interpretations of the facts or a willing ignorance. Whether humans are or are not influencing climate change is not a matter of opinion. Your thoughts on the matter are irrelevant. We either are or we are not. Your opinion on how much influence and effect is permissible does not change the facts. This sort of belief system is exactly why we have flat earthers and antivaxxers and antimaskers and climate change deniers. Beliefs like this are doing a gross disservice to the world we live in and the people that live in it. You misconstruing data and misrepresenting facts as opinion is how we get shit like Trump in office in spite of the many horrible things he's done.
My Console Library:
PS4, PS3, PS2, PS1, WiiU, Wii, GCN, N64 SNES, XBO, 360
3DS, DS, GBA, Vita, PSP, Android
Top 6 this generation:
Bloodborne, Sekiro: Shadows Die Twice, God of War, The Legend of Zelda: Breath of the Wild, Dark Souls III, Red Dead Redemption II, Rock Band 4