Question

why were large numbers of jewish individuals rounded up in the city of strasborg during the period of the black death and thrown onto pyres?

Answer 1

Answer: (for "causing") The Bubonic Plague

Explanation: After the Bubonic Plague (also known as back death) swept through Strasbourg "a tide of hatred swept over the city" and Jews were blamed for "Poisoning the Wells". This caused over 1,000 Jews to be grouped and burned to death on pyres as a "react" to "their" acts.