I think what annoys me the most about climate alarmism is the false certainty such as conflating opinion with fact. The second most annoying thing is the lack of scientific grounds for the arguments made.
"Alarmism" as you call it, is social. I've yet to read any scientific papers claiming we're all going to die.
As for your "lack of scientific grounds", that's just bullshit. The basic chemistry and thermodynamics were worked out well over a century ago. The first prediction of AGW was made by Arrhenius in 1899 (he also created the first climate model and is considered the father of modern chemistry). If you want to go further back you could talk a look at the preliminary work on greenhouse gas theory from Fourier (1825).
For example, the above two links in the parent post show considerable divergence between the models and reality (sea level and polar ice extent while substantially and suspiciously downplaying the temperature difference between model and reality). The "myth" is confirmed but the writer portrays it as affirmation of their desired conclusion.
Irrelevant. Those aren't scientific papers. They're not peer-reviewed. Any idiot on the web can say whatever they want. That doesn't make them a legitimate source of information.
Meanwhile the assertion that models fit past events is near irrelevant since that is data which is already known and it is expected that the models would have been adjusted in the first place to fit that data). For example, I can construct an interpolation of any temperature (or other numerical) data to perfect precision using an even degree polynomial of sufficiently high degree, yet it'll be completely irrelevant once I attempt any sort of extrapolation into the future (odds are good, about 50% I'd say, that it'll predict temperatures far below absolute zero by 2100).
Ignorance only hurts your argument. Climate models are physical simulations. They work based on physics, not some statistical curve fitting which is what you seem to be implying. Climate models are initialized with some historical set of conditions, and then run forward to see how well they model climate responses.
That's why physical models in general (fluid dynamic models, gravitational models, weather models, climate models, etc.) can be used for helping make useful decisions and research.
We see this attitude in action in the current story. First, the story noted that these models don't actually predict past events when they're run backwards from a current state. Then someone rationalizes that it's because the observations are wrong, not the models. This not only runs counter to your empty assertion that the models predict the known past, but also is profoundly anti-scientific.
You have terrible reading comprehension. The article (which isn't the paper) says the scientists used climate models to look into the past, not "run the models backwards". Running them backwards doesn't even make any sense. You can read the paper to see their methodology.
The issue the paper is addressing, which you fail to grasp, is that the the data from recent higher accuracy observations (namely the ARGO network) are reporting a lot more warmth than was previously estimated from earlier, lower quality observations. They then analyzed the discrepancies and discovered that global ocean heat in the upper 700m may have been off by as much as 25%, which would have potential impacts on things like CO2 sensitivity studies.
Here are two examples where the most FUD-inducing interpretations are used. The climate models are "too conservative" because they allegedly underplay sea level rise, but the corresponding inability of the models to predict temperature increase is not (though that means the models are exaggerating sensitivity of carbon dioxide temperature forcing, the most important of the unknowns in climate research.
You are viewing a climate model as a singular entity, which they aren't. A climate model is comprised of multiple physical models that interact to simulate the climate system. In addition, the model is only going to be as good as the data it gets. Some parts of the climate have a lot more data and are better understood than others.
All this and more is covered in the summary chapters of the IPCC. They go over the models, how they are run, accuracy, known unknowns, etc. Even if you think climate science is conspiracy created by Al Gore when he went back in time riding a velociraptor and threatened to club Fourier to death with a rubber baby Jesus, reading at least the summary sections would allow you to make much stronger arguments for your case.
Similarly, when models are shown to be out of whack with past observations (as they were with future observations), the interpretation is that the observations are wrong, not the models even though it is more likely to be the other way around.
The observations weren't "wrong". Did you even bother reading anything? The ARGO observations are higher resolution and more accurate. Even allowing for that they noticed a considerable discrepancy between the ARGO observations and the previous observations. That's what they investigated.
This profound inability to admit error is why I don't trust current climate models or the doomsday predictions they spawn in the least. That's why I'm going to wait a few decades and see what happens. If it genuinely is as bad as claimed, then we'll see something by then.
Error analysis is a fundamental part of any research, and climate science is no exception. You'll see it in practically every paper. Science is confidence intervals, not absolutes. Saying otherwise demonstrates a profound lack of knowledge and experience about how science, any science, is actually done.
There are no doomsday scenarios in climate science. We can certainly make living on Earth a hell for ourselves if we don't smarten up, but not single legitimate scientific source I'm aware of is predicting the end of the world, or even human extinction. So stop with that nonsense. It simply isn't true.
As far as the wait and see approach goes, I hear that always works out well especially when you're screwing around with climate system on the only planet we live on. By the time things are bad enough that even someone like you must face reality, it will be far too late to do anything about it. That's like getting a vaccination for polio after you're already paralyzed.