Go take a look at this page and tell me that it was "Biased" in its coverage.
Since that page contains not a single story on abuse in Rotherham dating from before the publication of the Jay report in August 2014, I'm not sure what point you're trying to make (the pre-2014 stories are about a 2011 by-election and a couple of local colour stories about Jamie Oliver's school meals). Are you saying that once the Jay Report was published, only a fool or a knave would deny the story? Yes, that's true. Now, what did CiF look like before August 26th 2014? Let's go back three years:
www.theguardian.com/commentisfree/2011/jan/07/grooming-racialising-crime-tradition
Which starts "Dubious claims about Muslim men grooming white girls hide legitimate worries about a system that fails victims of abuse"
So, it's dubious that Muslim men were grooming white girls? Does the jay report support that, would you say? Let's look at the executive summary:
By far the majority of perpetrators were described as 'Asian' by victims, yet throughout the entire period, councillors did not engage directly with the Pakistani-heritage community to discuss how best they could jointly address the issue. Some councillors seemed to think it was a one-off problem, which they hoped would go away. Several staff described their nervousness about identifying the ethnic origins of perpetrators for fear of being thought racist; others remembered clear direction from their managers not to do so.
and then flick to paragraph 5.5 where we find:
5.5 In this part of the report, we have not specified the ethnicity of the victims or the perpetrators. In a large number of the historic cases in particular, most of the victims in the cases we sampled were white British children, and the majority of the perpetrators were from minority ethnic communities. They were described generically in the files as ‘Asian males’ without precise reference being made to their ethnicity.
So, isn't it odd that the Guardian is a little bashful about "Dubious claims about Muslim men grooming white girls". How dubious were they? Not dubious at all, it would appear.