Hey, it was your claim, not mine. Where's the beef?
Not on Wikipedia, that's for sure.
The new historical fact is that van der Lubbe was falsely accused and convicted in an unfair trial by the Nazis.
The pardon granted by federal prosecutor, Monika Harms, happened after a lawyer in Berlin alerted her to the fact that he [van der Lubbe] had yet to be
exonerated under a law passed in 1998. The law allowed pardons for people convicted of crimes under the Nazis, based on the concept that Nazi law "went against the basic ideas of justice".
In other words, that you might understand, the pardon nullified the original Nazi conviction because the trial in 1933 was unlawful. In doing so, the "historical fact" of van der Lubbe's alleged guilt was also repealed.