i have no idea what’s going on. if anyone does could they please explain（╹◡╹）

Sid betrayed Cain because he believes that a King cannot be swayed by emotion. As you can see, Cain cannot kill him since they have been together for so long. Sid thinks that Cain is not fit to be the ruler.

I hope this somewhat clears it for you. :))

thank you so much for the clarification. helped me a lot