Many previous studies often neglect the personal role of Edward I when examining the cause of the Expulsion of the Jews in 1290, since Edward I was greatly influenced by his mentor, Simon de Montfort in the Baronial Movement of Reform and Rebellion, who helped him form the strategy of utilizing idealist image to protect their interests, along with Montfort's hostile attitude towards the Jewish community and pious faith. Consequently, to strengthen his reign, Edward I made the final resolution of the Expulsion to meet the demand of populace with a long‐term anti‐Semitist tradition seemingly and defend the benefits of the Crown practically.