So, here's the thing. I think it's one of the open questions of the film whether the replicants actually experience emotions or whether they simulate them. That is, they have a programmed set of responses. Whether they grow beyond that is possible. The key is in the memories - if Deckard is a replicant and his memories are simulacra then how do we know his emotions (or that of any other replicant) are not also simulacra? Maybe they do. I certainly agree it's a reasonable reading, and I agree that your interpretation of their motivations in killing Sebastian is consistent. But I think that's reading the surface and is not the only consistent or possible explanation.
Re: Wow
So, here's the thing. I think it's one of the open questions of the film whether the replicants actually experience emotions or whether they simulate them. That is, they have a programmed set of responses. Whether they grow beyond that is possible. The key is in the memories - if Deckard is a replicant and his memories are simulacra then how do we know his emotions (or that of any other replicant) are not also simulacra? Maybe they do. I certainly agree it's a reasonable reading, and I agree that your interpretation of their motivations in killing Sebastian is consistent. But I think that's reading the surface and is not the only consistent or possible explanation.