They don't battle him because the people that you just named are commercial sale outs and are weak.. they are respected by peeps like you..
ICP was funny as hell, and eminem never said nothing funny about THEM. he lied and said that he shot paintballs at them.. Bis is better than jay-z and DMX anyway, why bring them up? Eminem also disrespects Pac by rappin over his tracks about some petty ass shit, plus he's white..
But Bis has already proven himself, he didn't ge ripped in Canibitch coz, he's not here to respond, plus Canibitch was a weak play off of Slick Rick which made no sense..

Canibus will always be better than that white boy..

PUT IT LIKE THIS, I BET AIN'T No BLACK DUDE GONNA SAY THAT EMINEM IS BETTER THAN BIS... ONLY YOU LOYAL ASS WHITE FANS LOVE YOUR GREAT WHITE HOPE... HE'S TRASH, QUOTE FROM HIM.. "IF I WAS BLACK, I WOULDN'T OF SOLD HALF".. MEANING HALF AS MANY RECORDS.. he's not selling coz of talent ..SO GET A GRIP YA'LL, BIS IS THE ILLEST ALIVE....

PERIOD