Question

in the mid-1300s thousands of European Jews were murdered by other Europeans because

Answer 1

Christianity was the main religion in Europe. Jew were murdered because Christians were afraid Jews would spread their teachings. 
If Jews spread their teachings, Christianity would lose supporters. 

Christianity and Judaism were enemies. 

Hope my answer helps :) 

Answer 2

Answer:

The Black Death

Explanation:

In the 14th century, thousands of Jews living in Europe were massacres and persecutions because of the outbreak of the Black death. Deaths happened because of an epidemic that spread plague in Europe, killing one-third of Europe population. Without any evidence about the spread of disease, European began to blame Jews for the Black Death. Jews targeted by Christians because of the death of Jesus. Thousands of Jews were murdered by European as believing them to deliberately poisoning wells of Christians.