Where is Sir Andrew Green, the chairman of Migrationwatch, coming from? Those who accuse him and his organisation of stoking xenophobia tend to find themselves in receipt of a letter threatening legal action, so I'm not suggesting anything of the kind.
What I would say is that Sir Andrew seems to be in favour of protecting "British jobs". He is quoted on the BBC website opposing an amnesty for irregular migrant workers on these grounds: "We have the biggest recession in memory getting under way, two million unemployed, heading up for three million. Is it really suggested that British jobs should go to illegal workers? It just makes no sense at all."