Turks are to Germany what Indians and Pakistanis are to Britan and Italians were to New York.. Also as the Indians introduced chicken tikka masala, curry and chai to Britan the Turks introduced the döner kebab.
And at only 1.50 euro is probably the cheapest thing people with devalued currencies can afford [me]. Germans consume 200 to 300 metric tons of döner kebab per day. In 1998, they spent about €1.5 billion on döner kebabs. Also they're are supposed more popular then the home grown Currywurst or the frankfurter