Why did Eminem not like ICP?

The conflict between Eminem and ICP or Insane Clown Posse is one of the longest-running feuds in Detroit hip hop, dating back to the mid-1990s, and it stemmed from personal disputes, competitive local scene rivalry, and escalating diss tracks. According to both sides, the initial incident occurred in 1997 when Eminem was handing out flyers for his album release party and approached Violent J and Shaggy 2 Dope of ICP to ask if they would perform, and they reportedly declined and were dismissive, which Eminem took as disrespect. Eminem then included a line on his early track that mentioned ICP, and ICP responded with parody tracks. The feud escalated with diss songs like Eminem's Marshall Mathers and ICP's songs about Slim Shady. Both artists were competing for attention in Detroit's underground rap scene, with different styles, ICP being horrorcore with clown makeup and Eminem being battle rap, and there was mutual jealousy about success and radio play. Eminem's rising fame with Dr. Dre and Interscope intensified the tension. Over the years, they exchanged insults in songs, interviews, and at concerts. In recent years, both sides have downplayed the feud, with Violent J saying in interviews that it was mostly youthful ego and territorial Detroit pride, and Eminem no longer mentions ICP. The dislike was more about personal disrespect and competitive rivalry than musical differences.