WWE Hall of Famer Jeff Jarrett said Quinton "Rampage" Jackson's son's attack on an independent wrestler last week was complete B.S. ... and he tells TMZ Sports he's sure the 25-year-old will ultimately get his comeuppance.
Jarrett sat down with us a few days after Raja Jackson brutally roughed up Syko Stu at a KnokX Pro event in Los Angeles ... and he ripped the younger Jackson for his behavior.

Jarrett called the whole scene "absolutely, totally, bulls*** wrong," before he insisted the guy will at some point "pay for it.