There are, no doubt, some genuine concerns around regarding the matter of immigration; but there are undoubtedly some racist reasons for opposing immigration too. When we say “It’s not racist to want controls on immigration” then, whatever else we’re doing, we’re also placating racists by telling them their racism isn’t racist.
Genuine concerns about immigration tend to include such issues as the increased pressures that migrants bring to GP services, school places and the housing stock. We could cut immigration and that, along with a heroic dose of ceteris paribus, should alleviate these issues. But this broad brush approach would also mean we would be indulging the racists in their racism.
Alternatively we could respond to pressures on GPs, schools and housing by, you know, employing more GPs, expanding schools and building houses. This cunningly targeted plan should deal with those genuine concerns, meaning the only ones left are those that are intolerantly racist.
Show me a genuine concern around immigration and I reckon I can show you a solution which does not require tighter immigration controls, and so does not include the collateral damage of placating, indulging or tolerating racists and their racism. Sometimes the obvious needs spelling out; but for all of us opposed to racism, whatever our other concerns, the path we should choose seems pretty clear.