I've been involved where someone made an unfounded accusation against me at the workplace. It's not fun. You get defensive and emotional. You verbally fire back at the bs coming your way. And it takes a long time to cool down after the encounter,
Justin was clearly shaken up by what happened. He mentions it briefly in his YT vlog, but does not dwell on it. He expanded it further in his Patreon live, which is accessible only to his subscribers. It's obvious talking it about him helps him deal with it. And he does say the incident was most likely caught on livestreams and he wanted to get in front of it. One way or another, this would have came out.
As for Spence, he does admit he initiated the encounter. To me, this proves he is at fault. Add to that the circumstantial evidence of Spencer's recent DIY rants against other vloggers and that they have by their actions burned bridges with just about every popular Disney vlogger, it is a stretch to believe he "calmly" approaches Justin for a discussion regarding hearsay. Get real, when people think someone did them harm, they confront that person. That's what Spencer did and Justin reacted. There's no doubt BLAB's behavior that night proves they alone bear responsibility for being a toxic element that has been allowed far too long in Walt's happy Magic Kingdom.
There are still unanswered questions about this incident. What exactly was it that Spencer was accusing Justin of? And, if this incident lasted 30-40 minutes like Spence says, where the blue blazes was Disney security? Why does the only footage involving Security from that night do we see Katie hugging a security guy? This BLAB coddling by Security needs to stop.