Christiaan Snouck Hurgronje

"From Mohammedanism (which for centuries she [i.e., Aceh] is reputed to have accepted) she really only learnt a large number of dogmas relating to hatred of the infidel without any of their mitigating concomitants; so the Acehnese made a regular business of piracy and man-hunting at the expense of the neighboring non-Mohammedan countries and islands, and considered that they were justified in any act of treachery or violence to European (and latterly to American) traders who came in search of pepper, the staple product of the country. Complaints of robbery and murder on board ships trading in Acehnese parts thus grew to be chronic."