The Jews: Held No Intercourse with Strangers
Source: TTT
John 4:9
“You are a Jew,” said the woman. “How can You ask for a drink from me, a Samaritan woman?” (For Jews do not associate with Samaritans.)
Acts 11:2, 3
So when Peter went up to Jerusalem, the circumcised believers took issue with him / and said, “You visited uncircumcised men and ate with them.”