Shaped Like Itself: Since the document was forged by the Okhrana to achieve a particular function, if the content document obviously does not support either conclusion, then this can be taken to support the fact that it is a forged document; because the content that refutes the fact of its forgery and their purpose could have been added deliberately to make it look genuine or conceal their real purpose.
Additionally the forging of the Protocols is part of a conspiracy in itself by the Okhrana.
Do Not Do This Cool Thing: Comes into play because they are actually promoting for the ultimate state a policy which, at present, the alleged authors are opponents of, because if effectively carried out by existing regimes, then they would be far too belligerent for their taking.
He Who Fights Monsters: Since the Protocols were forged by the Tzarist regime to demonise the Jews, yet they look favourably upon an authoritarian government and poorly upon democratic government; it would seem at least in part to be actually intended to indoctrinate the reader in the authoritarian ideology of their windmill 'enemy'. It is supposed to make the reader assimilate the Authoritarian ideology of the made up enemy by attempting to understand them so as to effectively oppose them.
Red Scare: The likely motive behind the forgery. By such means they could discredit and cast suspicion on the disproportionately Jewish socialist opposition since they are described as working for the Elders.
Strawman Political: Because the Windmill Political advocates authoritarian right-wing ideology yet declares left-wing democratic ideology useful to its goals and was forged by that kind of regime; the Okhrana were likely creating a strawman version of their own ideology in order to contest with their real position. By destroying this strawman the authors reinforce their own similar ideology, since it is percieved as opposing the things that are useful to the strawman version of that ideology.