I think it has a lot to do with your utter lack of maturity than it does directly with your opinion on a specific band. Calling everybody "sheep" and "idiots" and "typical Slayer morons", along with myriad other insults, it's really no wonder people are not taking you, nor your opinion, seriously. That in addition to the fact that you evidently don't even own your "Top 10 Greatest Thrash Metal Albums Ever", since you just purchased Enjoy the Violence and Extreme Hatred.
To reiterate, nobody's getting upset because you don't like Slayer, they're getting annoyed because you're being such a faggot about it. Obviously your goal in this thread was specifically to provoke people, and since merely having an against the grain opinion wasn't good enough, you had to add in that anybody who disagreed was an idiot. Also, how the hell can you consider Hell Awaits one of the 15 greatest thrash albums and still continually say that you don't like Slayer? Wouldn't that mean that you DO like Slayer? Isn't having one of the 15 best albums in a genre pretty high praise coming from a guy like you who's heard everything?