I don't see this execution as an instance of state repression. In fact, not executing him could be called an episode of state oppression.
I'll repeat that all the arguments about efficacy, legality, social effects, and repression are legitimate, though not necessarily persuasive in all dimensions. What doesn't pass muster is anything based on sympathy for the condemned, which is what the pictures are all about. Insofar as the gore of an execution and/or sympathy for the victim are key to the case, then it is clearly lacking, on both an intellectual and moral level.
mbs