The angel"s unexpected appearance in the temple sanctuary had unnerved Zechariah ( Luke 1:12), but it was his greeting that troubled Mary. Perhaps he appeared at her door and she mistook him for an ordinary visitor. Gabriel calmed the fears he had aroused with an announcement of a special divine blessing (cf. Luke 1:13) by assuring Mary that God was happy with her (cf. Genesis 6:8; 1 John 4:17-18). Gabriel had come to announce a blessing, not punishment. [source][source][source]
"It is necessary here to recall our general impression of Rabbinism: its conception of God, and of the highest good and ultimate object of all things, as concentrated in learned study, pursued in Academies; and then to think of the unmitigated contempt with which they were wont to speak of Galilee, and of the Galileans, whose very patois [1] was an offence; of the utter abhorrence with which they regarded the unlettered country-people, in order to realize, how such an household as that of Joseph and Mary would be regarded by the leaders of Israel." [2][source]