Yeah, the video I posted that was taken down had the full sequence. But basically:
--Raja was backstage with wrestlers, with his Kick camera rolling
--SycoStu saw the cameras, thought Raja was a wrestler, and when Raja said he didn't know who he was, hit him over the head with a worked shot from a beer can (he punctures the can with his thumb, so no real violence to the blow)
--Raja is pissed, other wrestlers try to squash the beef, tell Stu that Raja isn't a worker, and tell Raja that it was a misunderstanding because Stu saw the camera, and they "are always working"
--Stu apologizes TWICE, and they eventually shake hands
--In an attempt to appease Raja's bruised ego further, they plan to let him do a run in, and get a receipt on Stu. Take him down and give him a potato sort of thing, and turn it into a work
--Raja gets instructed to do his run-in during the match
--Raja is on video saying they told him to give the guy a receipt, but he plans on beating the shit out of the guy
--Raja lives up to his word, and when he is instructed to go in for the run-in, he not only slams the guy in an unsafe manner (course he's not a worker), and then delivers 20-25 unprotected shots to the head of an already unconscious Stu
--Afterwards Raja bitches about people playing with him, and he's going to stand up for himself, even though he beat the shit out of a guy who gave up his body to him thinking it was a work
--When told the guy "flatlined" in the ring and isn't waking up, Raja says "my bad" nonchalantly, confirming what a total piece of shit he is
A contributing factor is the fact that Rampage routinely demeans his kid on streams and socials (calls him a faggot and wuss for being a vegan, told a story about kicking his ass after they got in a fight with each other, etc), which leads to him having a bruised ego. Then about a week ago he got clipped and almost KO'd in sparring, and since it was on Kick as well, Raja got trolled by the internet for it pretty hard.
So TLDR: man-child with shitty father and bruised ego takes the wrasslin' work serious, and premeditatively plans to beat the shit out of the guy during a "work" segment he was invited to participate in.