Au Contraire, the Sultan of Brunei, muslim head of state of the tiny south-east asian country, left a $170,000 tip to the waiting staff at a hotel in Cyprus.
Rich Arab Sheikhs from the gulf are notorious for their brazen display of wealth in europe as well.
the fact is, from a game theory standpoint the ideal Christian solution is the win /win while the ideal Islamic solution is I win one you lose one. In the end, the first is a better model for society than the second.