That Scripture says “anyone” because there is no difference between those who are Jews and those who are not. The same Lord is the Lord of all and gives many blessings to all who trust in him,
Abraham was circumcised to show that he was right with God through faith before he was circumcised. So Abraham is the father of all those who believe but are not circumcised; he is the father of all believers who are accepted as being right with God.