This study aims to examine the issue of the Moriscos by analyzing the work of Ahmed ibn Qasim Al-Hajari “Nasir al-Din ‘ala al-Qawm al-Kafirin” (d. after 1641 AD). The analysis focuses on the year 1556 AD, which is the year that the researcher identified as the beginning of Philip II’s accession(1556-1598) to the throne, and his legislation of unjust laws to obliterate the Arabic and Islamic identity of Moriscos until the year 1609 AD in which the King Philip III(1598-1609) decided to expelled the Moriscos of Andalusia forever, The dimensions of this issue were analyzed in this book. In this study, the researcher drew on the historical method based on description, analysis, and extrapolation for the purpose of establishing the historical context of the events that were associated with the Moriscos issue in this book. The comparative approach was also used due to the historical data provided by some primary sources, including translated Arabic and Spanish alike. This study is divided into an introduction, three chapters, and a conclusion. The first chapter covered a description of Ahmed bin Qasim Al-Hajari and his book, “Nasser al-Din Ala al-Qawm al-Kafirin” The second chapter highlighted the conditions of the Moriscos during the reign of kings Philip II and Philip III (1556-1609 AD), and the last chapter discussed the Moriscos immigration by addressing their migrations towards the countries of the Islamic and European. The study concludes with a number of findings but the most significant are as follows: The trip revealed the main contents of the intellectual, cultural, and religious interactions between the Moriscos and Christians during the seventeenth century, the Moriscos’ suffer from a dual identity crisis in Spain, and that the policy of forced integration of the Moriscos is an ineffective and counterproductive response to security concerns. This is a historical fact that has taken root in contemporary times and the emergence of the extreme left party in various European countries and its racist attitudes towards Muslims as culturally, socially and religiously different.