When you run across a person like NC who believes that Lincoln was gay, syphilitic, a bastard, a tyrant, a megalomaniac, fixed elections, was drug-addled, and planned to ship ex-slaves off to Panama, could you ever doubt that he would also believe that John Wilkes Booth was the pawn of the Radical Republicans?
There is a word for people with that sort of mentality - sociopath.
...a theory held by some scholars. It's dubious but nevertheless a possibility that cannot be ruled out.
syphilitic
Well documented by Herndon.
a bastard
Lincoln biographers have long known of a mystery about Lincoln's family origins and in fact the source of it is Lincoln himself. He revealed a secret of some sorts about his family to only two known people: Herndon and the author of his 1860 campaign biography. Scholars have long speculated about what that secret is and it is even doubtful that the two people he told it too knew the full details. The most commonly accepted version is that Lincoln's mother was illegitimate.
a tyrant, a megalomaniac
Both go without saying.
fixed elections
Of which evidence abounds in the Maryland gubernatorial race and the 1864 presidential race.
was drug-addled
We don't know for sure, though he is believed to have taken mercury pills that almost certainly impacted his health. Lincoln suffered from many health problems and frequently suffered from headaches and the sort. Modern medicine, which was unknown at the time, would associate several of his symptoms as adverse effects of the mercury that was probably intended to stop them but only made it worse.
and planned to ship ex-slaves off to Panama
Which is a thoroughly documented fact right down to the contract to do so bearing Lincoln's signature.
Doesn't speak to anything, actually, except your vexation at nolu chan for opposing you with documentation.
And pantsing you about your own lying and game-playing.