Earlier quoted context omitted.
Calling groups “crazy” to dismiss their arguments is a classic ad hominem .
I'm not dismissing any particular argument. I'm dismissing the attitude espoused in comments like this: > Try challenging climate science, even in a valid way, and see how popular it is on reddit or HN or twitter. It is an attitude that is a hallmark of cranks of all forms who think they've pierced the veil, but almost inevitably they have fallen for some distorted thinking that they can't see beyond due to the limit…
And labeling groups who disagree with them as “heretics”, “crazies”, “cranks”, etc is how the orthodoxy censors — as they’ve done for thousands of years.
That the orthodoxy seeks to censors dissent rather than address it, particularly when ignoring their own ridiculous members (eg, Al Gore and Greta Thunberg making absurd statements), is why trust in institutions has collapsed. Institutions now routinely engage in obviously dumb ideas because they censor their critics and then run off a metaphorical cliff.
In allowing themselves to censor and demean “cranks”, orthodox institutions have rotted badly — both from the perspective of delivering quality results and from the perspective of driving effective policy change.