The table of contents suggests 90-year war plan to unite Europe under the Knights Templar and restore pan-European identity. It doesn't need to be altered--it's already unbelievably stupid.
But he also knows a great deal about the political history of Europe and liberal thought, seen through a twisted lens. Furthermore, he follows a sort of Geert Wilders-like strain of Euro-nationalist ideas, dangerous ideas that have been gaining ground in parts of Europe. To alter this manifesto to include 'dumb things' is dangerous because first, it devalues the idiocy of his claims; second, readers will be more tempted to read it for the "good parts" while ignoring the "dumb parts"--who knows what parts were added, anyway? They'll be reading about the evils of Islam and multicultralism without understanding the fact--or dismissing it--that his ideas fit in a bizarre megalomaniacal framework of fantasy European domination, and deserve extreme scrutiny and mistrust.