Neither the OT nor the EU were butchered to conform to the Holiday Special or include “holidayisms”, so your argument is invalid.
- Bea Arthur is canonical now: http://www.ign.com/articles/2017/10/24/a-character-from-the-star-wars-holiday-special-is-canon-now
That’s not in the OT.
- Death of Chief Bast aboard the Death Star needs to be reconsidered, as he appeared in SWHS a year later.
That’s not in the OT.
- Kashyyyk, as shown in SWHS (and drawn by Ralph McQuarrie), eventually appeared in ROTS.
That’s not in the OT.
- According to “The Visual Dictionary of Star Wars, Episode III”, Itchy appeared in ROTS.
That’s not in the OT.
- Lumpa appeared in several EU literature, and Waroo is a canonical character since Aftermath: Empire’s End.
That’s not in the OT.
- many other references to SWHS have been made in the EU (see https://en.wikipedia.org/wiki/Star_Wars_Holiday_Special#Canonicity_of_the_special, “later appearances”).
That’s not in the OT.
So it seems that both OT and EU include several mentions to SWHS
None of that was in the OT.
Dear ray_afraid, DuracellEnergized wrote “Neither the OT nor the EU”.
“nor the EU”.
I repeat : “nor the EU”.
“nor the EU”.
“nor the EU”.
So I gave some examples of EU that include “holidayisms” (his word).
BTW, death of Chief Bast aboard the Death Star IS in the OT. Boba Fett IS in the OT. According to John Doom, Kashyyyk IS mentioned in the OT.
JEDIT: and Frink is right: HS is not even a film.