The majority of the Jews did not know that this child was born of a virgin because it was kept in secrecy (Mt 1:18,19) and there was no attention put upon him until the age of (12) and you can decide for yourself what this was in (Lk 2:40-49). Even those of the Jews that knew of the prophecy of the coming Emmanuel being born of a virgin in (Is 7:14), they did not know that this was the child, even though the virgin birth was to be for a sign. The people were not walking around thinking that this child Jesus, born to Mary, was strange because they did not know he was born of a virgin. If they had known she could have been rejected as a fornicator by her espoused husband and by the people according to the law, but she was not subject to that shame or rejection from others, but she and her husband with the child did flee to Eqypt being warned concerning Herod's edict. Read the account in (Mt 2) and see what you can glean from it.
Think of these verses of scripture in relationship to what the Jews had known of him... (Jn 1:5,11, 8:54-59, Mt 13:54-56).