Sorry; but our Catholics on FR would disagree. "our" Catholics? Name one.
We know from the Gospel of Matthew 1:14 that Joseph the husband of Mary was a righteous man, a devout law-abiding Jew.
Since they obviously TRUSTED in Jesus for their salvation; that makes them 'christian'.
No ... they did not trust in Jesus for their Salvation. They were not christian. Joseph predeceased Jesus. Mary followed Jewish law and had her son circumcised. Jesus was a rabbi. They were all Jews, including the apostles.
Perhaps you need to reread scripture.
No ... they did not trust in Jesus for their Salvation.
Matthew 1:19-21
19 Because Joseph her husband was faithful to the law, and yet did not want to expose her to public disgrace, he had in mind to divorce her quietly.
20 But after he had considered this, an angel of the Lord appeared to him in a dream and said, “Joseph son of David, do not be afraid to take Mary home as your wife, because what is conceived in her is from the Holy Spirit. 21 She will give birth to a son, and you are to give him the name Jesus, because he will save his people from their sins.”
Luke 2:25-30
25 Now there was a man in Jerusalem called Simeon, who was righteous and devout. He was waiting for the consolation of Israel, and the Holy Spirit was on him. 26 It had been revealed to him by the Holy Spirit that he would not die before he had seen the Lord’s Messiah. 27 Moved by the Spirit, he went into the temple courts. When the parents brought in the child Jesus to do for him what the custom of the Law required, 28 Simeon took him in his arms and praised God, saying:
29 “Sovereign Lord, as you have promised,
you may now dismiss[d] your servant in peace.
30 For my eyes have seen your salvation,
Perhaps you need to reread scripture.