There are so many of them. It's rather the style of thought I object to, rather than any particular POD.
1. Anything involving super weapons or weapons systems. These usually either grossly overestimate the effects of such devices or ignore problems of production, raw materials, or what other thing would be omitted to make this.
2. Anything which rests on historical myth. eg, those threads which begin with the idea that Reconstruction or Versailles were acts of unspeakable something or other.
3. Threads which rest on a premise which (to be valid) would involve a completely different social, intellectual, or cultural background. eg, Nazi Germany is nice to the Slavs, June 1941.
4. Threads which rest on a very sketchy knowledge of an era.
5. Threads which begin by making one assumption, when this is challenged add another to defend it, when this is challenged add a third, and so on.
6. Grand strategy threads. Somebody once gave a joking explanation for the poor quality of WWI British generalship. Upper class children who showed military interests would be given toy soldiers to play with. Childlike, they would suck them, and the lead paint would damage their brains. In the same way, too many AH types seem to have played far too much RISK in their youth. You know the sort of thing- Rommel takes Egypt, then the Middle East, then Afghanistan, India, and South East Asia. You can hear the subconscious thought, "well, they'll have all of Asia by now so that's another seven armies."
7. Threads which overestimate the impact ot thinkers and writers or which believe that there are secrets of leadership which can be picked up from reading some manual.
I could mention many others...
