It's not childish to label racist stereotypes, the types of statements that are quite clearly detailed in the terms and conditions of this board as ones that are not tolerated, as racist.
It's also not childish to expect people making wild claims to have evidence to back them up, because without evidence your claims are meaningless drivel.
As for asking me to justify my arguments, please find me an example of me making an argument that needs justification and I shall.
I'm all for a sensible debate on immigration and the issues the UK is suffering from, however the type of braindead garbage being spouted by you two doesn't qualify as sensible.