I don't think you're understanding my point here. The overwhelming majority of scientists working in the field of climate studies have concluded that humans are very likely responsible for the current warming, and that there is quite a lot we can do about it. This is simple fact. You can see this fact illustrated in the reports of the
Intergovernmental Panel on Climate Change. A particularly relevant graph can be found on page 7 of
this report.
To push aside this fact with claims like solar forcing or cosmic rays can muck up these figures is the same as an accusation that these scientists are idiots. It's as simple as that. Remember, after all, we are not simply talking about one or a few scientists coming up with these figures. We are talking about a huge panel, with well over a thousand scientists going over the possible issues in the various models. To suggest that they will ignore or overlook such blatantly obvious contributions is to suggest they are idiots.
This is something that it took me a little while to realize. Before I really got into science, I was always highly skeptical of the status quo. When some scientific conclusion seemed off to me, I'd always doubt it until I heard the evidence. While I think this helped my education, in that this sort of attitude is an excellent one to have within one's own field in science, it's not terribly healthy when you're not willing to put in the work to discover the evidence for yourself. In short, the reality turns out to be that unless you have dedicated years of your life to investigating a particular field of science, you are
very unlikely to be capable of finding any flaw in their scientific conclusions. And when you, therefore, see large panels of scientists from all over the world come together and agree upon something, unless you are prepared to investigate it in depth yourself, you would be wise to believe their conclusions.