It is simple, the politicians are fools.
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1) Rivers of Blood speech.
A speech criticising Commonwealth immigration and anti-discrimination legislation
"like the Roman, I seem to see the River Tiber foaming with much blood."
" It is like watching a nation busily engaged in heaping up its own funeral pyre. "
-- Enoch Powell, 1968
2) UK
In 1990, white population was 80% in London.
In 2010, white population was 60% in London.
In 1950, there were 10,000 British Pakistanis. Now there are 1.2 million British Pakistanis.
30 USA
In 1950, white population was about 90% in USA.
in 2014, white population is about 60% in USA
In 2050, white population will be less than 50% in USA.
In 2100, white population will be 1/3 in USA.
Latinos have passed whites as the largest ethnic group in California in 2015.
California , in 2015, white population was 38%.
Texas, in 2015, white population was 43%.
The Majority of American Babies Are Now Minorities (2012) - The Census Bureau
"Fighting age."
In the USA, whites having the oldest median age, 42, Hispanics have the youngest, 27.
Non-Hispanic whites, Wikipedia