They once killed a man for saying the world was round and the sun was at the centre of our galaxy!  Then we had the rivers of blood speech only 40 years ago.  Quite simply some people find progress very frightening.  It was once said there were more Irish in London than in Dublin and their Catholic religion was alien and worrying to many.  What people now forget is that due to the problems this swift increase in population created went on and led to the creation of some of the most important things a modern city requires and the world now takes for granted.

A good example of this is Sir Bazeljets work.  he was forced into creating the worlds first  city wide sewage network  which flows under our cities ever since at a steady 1.2 miles per hour.  He also created the first underground train line.  Not only did the Immigration issue of the time be his mother of invention but the Immigrants themselves even built the systems as cheap labour.  Immigration is progress and anyone who denies this one simple fact always reminds me of King Canute. 

Today with Immigration such as the tier 1 visa people from across the globe are able to take advantage this progress.