Original sentence: "Thou shalt have no other gods before Me" implictly accepts the existance of other gods.Even the first commandment reflects the henotheistic nature of early Judaism.Judaism does not appear to become strictly monothesitic until after the Jewish people is freed from Babylon by Cyrus the Great (c539 BC)
Edited sentence: Even the first commandment reflects the polytheistic nature of Judaism - "Thou shalt have no other gods before Me" - which implictly accepts the existance of other gods.Furthermore, Judaism does not take on a strict monothesitic nature until after the Jewish people is freed from the Babylonian imprisonment by the Persian King Cyrus the Great 539 BC.However, their arguments are not supported by facts