How long does Class A have?

It doesn’t really matter whether it’s science or propaganda; the non-believers will always find an exit-clause that aligns with their politics.

^^ This. As in audio, its almost impossible to be truly objective.

Any climate scientists that disagree that man may not be the cause or study alternate theories get ridiculed and some even have there careers ruined. That's not how science should be.

I agree with your conclusion- that sort of thing happens in science. But how did you arrive at the first statement here? Do you know of someone to whom this happened? I would not use that site you linked earlier as its really not an accurate source.

""The List" - Scientists who Publicly Disagree with the Current Consensus on Climate Change - Electroverse"

Pretty short list compared to the thousands who say otherwise! Apparently the electroverse site is not regarded as much more than a haven for crackpots:
https://mediabiasfactcheck.com/electroverse/
For cases like this, Occam's Razor is a handy tool for wading thru messes (she said he said) like this.  Here is one 'scientist' claiming:
https://electroverse.net/the-next-30-years-will-be-cold-says-climate-scientist-dr-willie-soon/
but then we find out that he's got some interesting funding, as reported by the Guardian 6 years ago or so:
https://www.theguardian.com/environment/2015/feb/21/climate-change-denier-willie-soon-funded-energy-...
When you see something like this, the more complex explanation is that despite all the evidence to the contrary and the money being paid to him by big oil and political groups with an agenda that he's telling the truth. The simpler explanation is he's paid to lie. Occam's Razor is handy for things like this.