Grow up and stop being afraid of everything that comes from the middle east.If the arabic numeral system hadnt reached europe, we would be still using silly roman numerals to count!
shariah banking has existed and thrived in the middle east for centuries.it is a moral system -definitely more moral than fiat banking.
the middle east also used to have a honor based money transfer system called the hawala -money transfer was pretty quick and charges very low. ever tried exchanging currencies at an airport?. the spreads these banks charge today are nothing short of robbery.
there is plenty to learn from the middle east -they invented algebra (al gibr) if you keep your eyes and minds open.