OUTSPOKEN Queensland MP Bob Katter says the "un-Australian" people waging an online campaign against broadcaster Alan Jones have released the "intolerance tiger" from its cage.

Mr Katter said Mr Jones's remarks, that Prime Minister Julia Gillard's father had died of shame, was a "classic example of someone letting their mouth run".

But he defended the right of journalists and media commentators to express their views and warned the "politically-correct brigade" calling for advertisers to pull their support from Mr Jones's 2GB program to be careful.

"These people better wake up and realise what they're doing is a blatant intrusion and transgression of freedom of expression," said Mr Katter.

"And now even some of the violin-playing hand-wringers are starting to become embarrassed, because it's Alan Jones today and it will be them tomorrow, once the intolerance starts and the freedom of speech stops.

"What is happening here is un-Australian. The intolerance tiger has been let of the cage and it will maul left and right - and also those of us in the middle."