Suge Knight & Katt Williams -- Club Fight Started Over Racial Slurs and Obama

Suge Knight and Katt Williams claim they are NOT TO BLAME for that massive parking lot brawl last week ... saying it started when some jerks flung racial slurs at them and shouted "F**k Obama" repeatedly.

As TMZ first reported, Suge and Katt were caught on video tangled up in a huge fracas last weekend outside Eden nightclub in Hollywood (see below).

A rep for Suge tells TMZ ... the rappers in NO WAY started the fight. The rep claims while Katt was talking to a TMZ photog ... a horde of guys started calling him the N-word, specifically shouting "f**king ni**er" and then "F**k Obama."

*** WARNING: VIDEO CONTAINS LOTS AND LOTS OF PROFANITY

We're told Katt walked over the culprits to ask them to stop, but the group wouldn't quit. The verbal exchange got heated and Suge's rep says one guy got physical with Katt.

The rep tells us that's when Suge stepped in, trying to keep the incident from escalating further ... but Suge and Katt realized it was two against 15, so that's when they decided to get out of there.