Jewish communities responded to persecutions and expulsions during the medieval period in various ways. One primary response was migration, as Jews sought refuge in more tolerant regions or countries. This led to the establishment of new Jewish communities in Eastern Europe, the Ottoman Empire, and later in the Americas. Another response was the development of a rich cultural and religious internal life, as reflected in the writings of Jewish scholars and mystics of the period. They also adapted by forming close-knit community structures to provide mutual support and maintain their cultural and religious identity despite external pressures.

In medieval Europe, Jews were often barred from various professions and land ownership, leading them to roles in trade and moneylending. Moneylending, in particular, was a niche Jews filled due to Christian usury laws prohibiting interest on loans. While this economic role was vital for the medieval economy, it also led to resentment and stereotypes of Jews as greedy or exploitative. When debtors, including nobles and peasants, could not repay their loans, this resentment sometimes resulted in violence against Jewish lenders. Additionally, the economic success of some Jewish communities in trade and finance fuelled envy and suspicion among non-Jewish populations, exacerbating tensions.

There were instances of protection and support for Jews from Christian authorities during this period, although these were relatively rare. Some monarchs, recognising the economic and administrative contributions of Jews, offered them protection. For example, King Henry III of England granted a charter of protection to Jews in 1255. In the Holy Roman Empire, Emperor Frederick II issued constitutions protecting Jews, recognising their value to the imperial treasury. Additionally, some local leaders and church officials, like Pope Innocent III, publicly condemned violence against Jews, albeit with varying degrees of effectiveness. These instances of protection, however, were often pragmatic in nature and did not signify a general acceptance of Jews in Christian society.

The medieval Church played a crucial role in shaping public opinion about Jews. Through its teachings and sermons, the Church perpetuated stereotypes and myths about Jews, such as the accusation of deicide (the killing of Christ) and the blood libel myth (the belief that Jews used Christian blood for religious rituals). These teachings were disseminated widely, as the Church was the primary source of education and moral guidance. Additionally, the Church's policies and decrees often institutionalised anti-Semitism, such as through the Fourth Lateran Council of 1215, which imposed distinctive dress codes on Jews. This ecclesiastical influence cemented anti-Semitic attitudes in medieval society.

The Crusades had a profound impact on Jewish communities far beyond the Holy Land, particularly in Europe. As Crusaders journeyed towards the Middle East, they encountered Jewish communities along the way. In many instances, these Crusaders, fuelled by religious fervour and a desire to combat non-Christian entities, perpetrated acts of violence against Jews. This was notably seen in the Rhineland massacres of 1096. These massacres were among the first large-scale, organised pogroms against Jews in Europe, setting a precedent for future anti-Jewish violence. The Crusades also contributed to the deepening of the theological and cultural divide between Christians and Jews, reinforcing existing prejudices and stereotypes.