The source that this story has come from is Derry himself in a story to the Mirror. Kitty has categorically denied making the racist statement, but has admitted they had a tiff.
If - and it's a big if because it's his word against hers - she has said what is claimed then yes, she should leave. In the heat of the moment we all say things - of course we do. But it would NEVER EVER occur to me to make a comment based on the colour of someones skin. I might call them a noisy swine, or a totally evil bar steward, but as soon as you string the colour of a persons skin or their nationality or their religion into an insult, you are making a racially motivated comment....and that doesn't just come from nowhere, no matter how riled or upset you are!!!
If on the other hand it is a false allegation, then I believe that Derry should leave. So much work is done in this country to battle racism and prejudice, and break down cultural barriers and making false claims of racism belittles all the good work being done.
More than anything else, I think the X Factor producers need to be taken to task about this!! As I've said on another thread, they have allowed this situation to spiral into a farcical pantomime!! Either a young lady is having her good name besmirched for absolutely no reason, or a young man was racially abused while in their care and what have they done??? Jack all, but milked it for all it's worth!!! They have a duty of care towards the contestants and no matter what happened between Kitty and Derry, 1 of them has been seriously let down by the powers that be!!!!