The Scotland international sustained a fractured fibula and tibia in a challenge with Rovers defender Gael Givet in the FA Cup on the weekend and as he lay on the ground in agony, Diouf abused him, calling him a 'disgrace'.
Mackie could not believe that the Senegalese striker would abuse someone when he was down and the actions have infuriated the former Plymouth Argyle man.
"I'm trying hard not to think about Diouf," he told SunSport.
"That's because when I do it makes me want to snap my cast off and run up there and find him.
"It's disgusting what he did. People like him need to be highlighted.
"There's NO place in football for the likes of Diouf. There's a line and he crossed it. Diouf was repulsive."
But QPR boss Neil Warnock said it was something to expect from Diouf who has a history of bad sportsmanship.
"I have always thought he was a gutter type of boy," he said.
"I was going to call him a sewer rat - but that might be an insult to sewer rats.
"Even the Blackburn players were embarrassed about it. He told Jamie he was a disgrace."