Following your line of reasoning there were two standards of Christianity...one for Jewish Christians and one for gentile Christians. That's goes against logic, history and scripture:
Matthew 15:21-28
21 And Jesus went away from there and withdrew to the district of Tyre and Sidon.
22 And behold, a Canaanite woman from that region came out and was crying, "Have mercy on me, O Lord, Son of David; my daughter is severely oppressed by a demon."
23 But he did not answer her a word. And his disciples came and begged him, saying, "Send her away, for she is crying out after us."
24 He answered, "I was sent only to the lost sheep of the house of Israel."
25 But she came and knelt before him, saying, "Lord, help me."
26 And he answered, "It is not right to take the children's bread and throw it to the dogs."
27 She said, "Yes, Lord, yet even the dogs eat the crumbs that fall from their masters' table."
28 Then Jesus answered her, "O woman, great is your faith! Be it done for you as you desire." And her daughter was healed instantly.