A Barbarian is a Third World savage, often a North African or Arab from the Barbary Coast. The Wikipedia's explanation is not one of their better offerings, being rather evasive. It chooses to allege that 'perceived' savages are merely in the eye of the beholder. The Wiki is, ultimately a Propaganda machine. Albeit it does have an article on Barbary pirates.
There are Barbarians aplenty in a wicked world. They were enthusiastic slavers who terrorised southern Europe and further on. They made it to England and Ireland. See Barbary Slaver In English Waters.
Now Merkel is busily importing them into Germany in an act of Ethnic Fouling & Genocide. It is the same for Cameron in England. Then there are the other countries that constitute Western Civilization being betrayed by their governments. See e.g. Ethnic Fouling. Some of Lenin's Useful Idiots collude in this destruction because they have fallen for Pathological Altruism; others are too cunning to believe in it, except as a working tool.
Barbarians ex Wiki
A barbarian is a human who is perceived to be uncivilized or primitive. The designation is usually applied as generalization based on a popular stereotype; barbarians can be any member of a nation judged by some to be less civilized or orderly (such as a tribal society), but may also be part of a certain "primitive" cultural group (such as nomads) or social class (such as bandits) both within and outside one's own nation. Alternatively, they may instead be admired and romanticized as noble savages. In idiomatic or figurative usage, a "barbarian" may also be an individual reference to a brutal, cruel, warlike, insensitive person.
The term originates from the Greek: βάρβαρος (barbaros). In ancient times, Greeks used it mostly for people of different cultures, but there are examples where one Greek city or state would use the word to attack another (e.g. haughty Athenians calling the Boeotians barbarian); in the early modern period and sometimes later, Greeks used it for the Turks, in a clearly pejorative way. Comparable notions are found in non-European civilizations, notably China and Japan. In the Roman Empire, Romans used the word "barbarian" for many people, such as the Germanics, Celts, Iberians, Thracians and Parthians............
The Oxford English Dictionary defines five meanings of the noun barbarian, including an obsolete Barbary usage.