Actually, I agree the topic is not something that can be discussed in a simplistic manner. To top it all off, no climatologists have successfully created a climate model which takes into account every variable impacting climate on Earth. They are still discovering things which impact the climate. Many of these items are not fully understood either, which makes it more difficult, if not impossible, to do a full climate model.
that can be said of any model of the real world, its impossible to perfectly model anything. apart from the practical problems, without getting too physicsy, there is ultimately a problem with information. models just try to give predictions, some are better than others and they all evolve.
new discoveries which dont fit the model are like christmas presents for scientists because they get to refine their model and make even better predictions. climate models are evolving rapidly and the more sophisticated they get, the more they seem to be pointing in the same direction. not in a "
we're 100% sure we've nailed it!" way, more of a "
looks like we're getting a handle on this stuff and we should probably be worried about it given the catastrophic consequences" way.