Why are you incapable of responding to my actual posting? It doesn't seem all that confusing to me. I even illustrated the matter using your example of 9/11.
You guys are denying white racism and its effects on black people in the US - basic physical and historical facts of the matter. That is absurd. You have also, in the past, denied AGW and the Holocaust - basic physical and historical facts. This tendency of such denials to cluster in individuals seems relevant to the thread, to me.
So, it seems that my speculation about your motives is correct. Namely that you have listed some "absurd" positions, which nobody has proposed here, to discredit those with quite reasonable positions (positions you cannot argue against with scientific facts and reasonable argument) simply by association. Your invented absurd positions are those of "deniers", those you have to confront here you also name "denial", and by using the same name for them they are all absurd and evil.
You also continue to lie. Because I have never denied the Holocaust.
The tendency to cluster is, indeed, relevant, and I have proposed a simple and natural explanation. There is one cluster of people like you, who follow what they think is the good/political correct/mainstream/party line/government/official position, name it as you like, this is not the point, the distinguishing property is submission to the mainstream. And there is the other cluster, those who do not trust the mainstream, and are ready to evaluate all positions using a neutral, skeptical approach, with a scientific attitude, where one cares about evidence, about arguments, but not about mainstream or political correctness or so.
The problem of such a critical attitude is that you need a lot of knowledge, and time to get it, to have a chance to find the correct answer which differs from the mainstream answer. Else, you will be often correct that the mainstream position is wrong, but your own position will be wrong too.
Because of this danger, I support only a few specific non-mainstream positions, and in most areas where the official position is obviously BS I say it is BS, but do not specify what is the truth. This is my 9/11 position. Clearly, almost all alternative versions are BS too.
In AGW, I reject as BS only a particular aspect of the media presentation: They present only negative consequences of global warming, as if there would be no positive ones. And I'm quite safe to claim that positive consequences exist. And I can even list a few sufficiently obvious advantages: 1.) More CO2 leads in general to more plant growth, 2.) There are large regions which are too cold now for agriculture, but could be used for this in case of global warming, 3.) AGW predictions all use amplification by more H2O in the atmosphere, which would lead to more rainfall in the average, and there are also large regions with insufficient rainfall for agriculture now. But it is also clear that there will be negative effects too. And I have no opinion at all about the question if there is a global warming or not, nor about the size of the effect, nor about its origins. All this would require intense own research, and I have no time for this.
For the Holocaust, I do not support any particular position, and expect the mainstream position to be more or less correct. All what I criticize is how the deniers are handled - imprisonment is not an appropriate way to handle disagreement about historical questions.