Racially abused? Not how I recall it. He got a mouthful off some yob in the crowd having previously blew his top and got a deserved red.
Players (wrongly) get dogs abuse off opposition fans - he just kicked off because he'd already lost it and was looking for someone to take it out on.
And the irony is here, that you're actually trying in a small way to justify it with reference to "provocation" - which illustrates the point I'm making.
When you actually look at it he dived feet first into a crowd of innocent bystanders, including women and children to try and stove some morons head in, having to be dragged back by teammates - because a bloke was shouting at him. Hardly justified and frankly if that were Suarez or Barton they'd be chased out of the PL these days.
I've still never seen anything like it to this day, and the club, and fans welcomed him back with open arms, cheering him when he scored on his first game back like a hero.
As I've said repeatedly I'm not justifying anything. Suarez deserves to be banned for a long time - both for club and country. But the fans will always back him because that's what most fans do.