Final answer:
One of the sources of antisemitism from ancient history was the Jews' monotheistic rejection of all other gods.
Step-by-step explanation:
This rejection of polytheism and worship of only one God made Jews stand out among ancient societies and often led to them being seen as different and suspicious. One of the sources of antisemitism from ancient history was the Jews' monotheistic rejection of all other gods. Many ancient civilizations, such as the Greeks and Romans, had polytheistic beliefs and viewed the Jews' monotheism as a threat to their own religious practices.