Hatemonger would be a more appropriate word than Scaremonger.

Well, he's right in a sense, Tarantino does take or borrow a lot of imagery and scenes from other movies. Whether he's doing it to pay homage to them or not is up for debate.

"or what it was that New Line found special about the material that an obsessive fan like Gordon-Levitt didn’t."

Kronos didn't look anything like Boba Fett. The joke works just fine with the character design.