Philip II feared simultaneous Morisco, Ottoman, and Italian princely revolts

Evidence

What is to be feared is the multitude of Moriscos among whom are men so anxious to throw off their subjugation and so stubborn in their adherence to their beliefs (secta). He has also taken into account that the Turk, according to the latest reports, is disengaging himself from his conflicts with those in rebellion against him, and with the Persians; also that the disaffection that has become apparent among even those Italian princes who have been most committed to our cause, because the resources of the kingdoms His Majesty possesses there have been exhausted and used up, and his subjects there have become discontented, so that there is reasonable cause to fear that once they see His Majesty occupied in the defense of these realms against attacks from enemies who are so many and so powerful, they may move against His Majesty in a way that cannot be resisted, so that everything will be in peril. — L. P. Harvey, Muslims in Spain, 1500 to 1614, 1416