The most common thing that may cause a xenophobic attacks was : An irrational fear towards foreign people/culture
Xenophobic people, tend to see foreigner as a threat, whether directly to their lives or other aspect of their lives, that may trigger them to attack that foreigner
Answer: Johanan ben Zakkai, (flourished 1st century AD), Palestinian Jewish sage, founder of an academy and an authoritative rabbinic body at Jamnia, who had a decisive influence on the continuance and development of traditional Judaism after the destruction of the Temple (AD 70).
Explanation:
They start to make more advanced creations