Poorer people are always attracted to the centres of wealth and power.He's right. It's not racist to resist having you country's population expanded massively by corrupt politicians who promise to do the opposite, putting huge strain on housing, healthcare, schools, roads, etc, etc. It's just incidental that the millions flocking here are usually from a different race. There's little incentive for millions of Belgians or Norweigans to decamp to UK, but those from poorer undeveloped (some never to develop) countries have a lot to gain.
Seems like even immigrants have worked out that overloading the lifeboats benefits no one.
This is one of the reasons why empires collapse.
With European decolonisation the rest of the world was free to roam in search of the shiny stuff they saw on their Chinese smart phones.
Ancient Rome had the same problem, as the Romans retreated from empire they were followed by hordes of former subjects of the empire.
Once word had spread of free Bread and Circuses to be had in Rome, that was the beginning of the end.