4% of the total Spanish population), the extent and severity of the expulsion in much of Spain has been increasingly challenged by modern historians such as Trevor J. Dadson. Nevertheless, the eastern region of Valencia, where ethnic tensions were high, was particularly affected by the expulsion, suffering economic collapse and depopulation of much of its territory. Of those permanently expelled, the majority finally settled in the Maghreb or the Barbary coast. Those who avoided expulsion or who managed to return were gradually absorbed by the dominant culture. The Inquisition pursued some trials against Moriscos who remained or returned after expulsion: at the height of the Inquisition, cases against Moriscos are estimated to have constituted less than 10 percent of those judged by the Inquisition. Upon the coronation of Philip IV in 1621, the new king gave the order to desist from attempting to impose measures on remaining Moriscos and returnees. In September 1628 the Council of the Supreme Inquisition ordered inquisitors in Seville not to prosecute expelled Moriscos "unless they cause significant commotion." The last mass prosecution against Moriscos for crypto-Islamic practices occurred in Granada in 1727, with most of those convicted receiving relatively light sentences. By the end of the 18th century, the indigenous practice of Islam is considered to have been effectively extinguished in Spain. Christian heretics The Spanish Inquisition had jurisdiction only over Christians. Therefore, only those who self-identified as Christians could be investigated and trialed by it. Those in the group of "heretics" were all subject to investigation. All forms of heretic Christianity (Protestants, Orthodox, blaspheming Catholics, etc.) were considered under its jurisdiction. Protestants and Anglicans Despite popular myths about the Spanish Inquisition relating to Protestants, it dealt with very few cases involving actual Protestants, as there were so few in Spain. The Inquisition of the Netherlands is here not considered part of the Spanish Inquisition. Lutheran was a portmanteau accusation used by the Inquisition to act against all those who acted in a way that was offensive to the church. The first of the trials against those labeled by the Inquisition as "Lutheran" were those against the sect of mystics known as the "Alumbrados" of Guadalajara and Valladolid. The trials were long and ended with prison sentences of differing lengths, though none of the sect were executed. Nevertheless, the subject of the "Alumbrados" put the Inquisition on the trail of many intellectuals and clerics who,