I would definitely dispute the notion that HAL 9000 is evil.
Even in the original film, HAL makes it clear that he has no problems working with humans, as such. So it's not like he eliminated the crew because he hates organic life. He was just facing a serious dilemma in his programming. Plus he was unprepared for the notion that he could be deactivated. So he was faced with the possibility of his own death and acted in self-defense.
That said, I am convinced that the government could still have found a way to explain to HAL why it was necessary to not tell Frank and Dave about the monolith. The simple fact was, it wasn't important to the mission. Frank and Dave's job was simply to get Discovery to Jupiter. They didn't NEED to know about the monolith. It just wasn't important to the mission. There should have been a way to make that clear to HAL.
And if Dave or Frank had asked HAL about the purpose of their mission to Jupiter? HAL could have just said "Im sorry, that's classified." Because that is exactly what it was.
Even in the original film, HAL makes it clear that he has no problems working with humans, as such. So it's not like he eliminated the crew because he hates organic life. He was just facing a serious dilemma in his programming. Plus he was unprepared for the notion that he could be deactivated. So he was faced with the possibility of his own death and acted in self-defense.
That said, I am convinced that the government could still have found a way to explain to HAL why it was necessary to not tell Frank and Dave about the monolith. The simple fact was, it wasn't important to the mission. Frank and Dave's job was simply to get Discovery to Jupiter. They didn't NEED to know about the monolith. It just wasn't important to the mission. There should have been a way to make that clear to HAL.
And if Dave or Frank had asked HAL about the purpose of their mission to Jupiter? HAL could have just said "Im sorry, that's classified." Because that is exactly what it was.