Farage has said that he supports Muslim immigrants who integrate to British society, but is against those who are "coming here to take us over", citing John Howard's Australia as a government to emulate in that regard. He told a Channel 4 documentary in 2015 that there is a "fifth column" of Islamic extremists in the United Kingdom. Farage has said that the "basic principle" of Enoch Powell's 'Rivers of blood' speech was correct: "What he was warning about was the large influx of people into an area, that change an area beyond recognition, there is tension," he said."