That right there is one of the single durabest posts I've ever read! get your head out of your a**! Slayer created thrash metal, that's no gimmick. Slayer's music is regarded as being a major influence on death metal. None-the-less, through the higher pitched vocals in their songs (compared to the lower death metal range), notes their influence on black metal. S**t loaRAB of premier black metal acts like Emperor or Mayhem name Slayer as a major influence. As for their "gimmicks," in a 2004 interview with Tom Araya, was asked about their lyrics, "Did critics realize you were wallowing in parody?", Tom Araya replied, "No. People thought we were serious!...Back then you had that PMRC(Parents Music Resource Center), who literally took everything to heart. When in actuality you're trying to create an image. You're trying to scare people on purpose". Those who disagree with the critics will tell you that Slayer has no Nazi sympathies or racist views, and point out that Tom Araya and Dave Lorabardo are of Hispanic desent.
Slayer moves to challenge society's norms and problems, thus their lyrics seek to promote opposite ideals of tolerance and nonviolence. On top of that, Slayer is tied to the hardcore punk scene, which is totaly anti-racist.