Answer by taking a quote from the following article:

Kyle Dalton Sandilands (born 10 June 1971) is an Australian radio host living in Sydney. He is currently the co-host, with Jacqueline Henderson, better known as Jackie O, of the weekday morning radio program The Kyle and Jackie O Show on Sydney's radio station KIIS 106.5. From 2005 to 2009, Sandilands served as a judge on Australian Idol. In 2008, he became the host of Big Brother, alongside Jackie O.

On 3 August 2009, Network Ten issued a press statement announcing that Sandilands had been sacked from Australian Idol, citing the network's view that the Kyle and Jackie O Show's content was incompatible with the family-oriented image of Idol. Guest judges replaced him for the rest of the season. It was also announced that the Kyle and Jackie O Show on 2Day FM and The Kyle and Jackie O Hour of Power would be in recess until a review was completed. A Network Ten spokesman said of Sandilands' firing: "Idol has remained a family-focused show, even more so this year with the 6.30 pm Sunday timeslot. His radio persona has taken on a more controversial position... which is not in the interest of the show."  Responding to his firing, Sandilands said in a statement, "I'm disappointed at Channel 10's decision to remove me from Australian Idol. I have truly loved being a part of the show." Network Ten had held crisis talks with advertisers in the days prior to his firing amid concerns Sandilands would damage their brands. Idol creator Simon Fuller reportedly gave Ten his blessing to fire Sandilands. It was believed Sandilands earned A$1 million of his estimated annual A$2.8 million income from Idol. The suspension of the radio show was announced on Sunday 2 August 2009. The show's usual 6:00 am to 9:00 am slot on 3 August was filled by Chris Page who announced that "They have not been suspended ... the show has not finished." Page then re-read Austereo general manager Jenny Parkes' statement on air just after 6:30 am:  Kyle Sandilands's management has advised Austereo that he is unable to perform his duties on-air at this time. Further, following a great deal of consideration and having consulted Jackie O and all stakeholders, Austereo has formed the view that it is in the interest of all parties for the [program] to go into recess until we have completed an across-the-networks review of the principals [sic] and protocols of our interaction with our audience.

Why was he fired from network ten?
Idol, citing the network's view that the Kyle and Jackie O Show's content was incompatible with the family-oriented image of Idol.