I've given your arguments a lot of credit because of your background and because you've kept them out of trolling territory; I truly believe you feel the way you've posted. And that's fine, you're entitled to your opinion just like I am. But what you wrote in the sentences above is essentially placing all of the blame on someone that had no idea what the results of their actions would be (Superman) instead of the people that actually committed the crimes (Zod etc.).
I mean, let's take an extreme example where I'm even knowingly wrong, not just completely oblivious. Say I'm a terrible pet owner and I leave my dog outside and let it bark all fucking day long. You're my neighbor and you can't take it anymore, so you shoot my dog. YOU are the one that chose to shoot the dog, not me. Sure I created the situation, but you always have the choice, I didn't force you to do what you did. To me, Superman wasn't anywhere near as guilty as my hypothetical dog owner because he had no idea what would happen. Would you know what is going to happen when breaking into an alien ship? Maybe activating it causes rainbows to shoot out and everyone's dick/boobs to grow larger. To take the analogies to even more ridiculous levels, it is akin to saying that the slutty girl is responsible for the guy raping her. No she isn't. She created the situation, sure, and used poor judgment, but the rapist is the one that chose that course. Superman didn't even dress like a slut, he wasn't "asking for it."
My point being, you are 100% placing all of the blame upon Superman just because he activated the ship (which as Tuco pointed out might have happened with us fucking with it anyway). They were going along searching all of the old sites anyway, so at some point they would have come to Earth just because the ship was there, even if Kal-El wasn't. How do we know that he doesn't just decide to trash the planet anyway? Zod is the one responsible for making his decisions, and Zod alone. Whether Kal-El precipitated the events is irrelevant, because there's always a choice, and Zod chose to destroy the planet.