Thanks for the welcome. Yes, I am a new member, & I am new at this. Not intentionally meaning to try to purposely break forum rules.
One, that belief is not in Scripture,. If Joseph had older children from a previous marriage, then why aren’t they mentioned in the caravan with Mary & Joseph when Jesus was left behind in the Temple (if Jesus had younger half-brothers & half-sisters, they may not have been born yet, or they were simply not mentioned, since they were much younger children - not unusual not to mention them). Three, the belief that Joseph had children from a previous marriage, that he was a widower, is based on the false Infancy ‘gospel’ of James, which both the Catholic & most Protestant churches reject, yet many Catholic beliefs are based on some of the things this false ‘gospel’ teaches that are not in Scripture, such as the author being Joseph’s son, James, from a previous marriage, that Joseph was much older than Mary, that Mary was 16 at the Annunciation (her age is not revealed in Scripture), that Mary’s mother’s name is Anna (again, not revealed in Scripture), that Gabriel is an archangel (even though he’s only called an angel twice in Luke, & the perpetual virginity of Mary (which contradicts the Bible - Matthew 1:25). Mary’s virginity was to fulfill Old Testament prophecy to identify the Messiah & His mother, & to show that the Messiah’s birth wasn’t an ordinary one, but rather a miraculous one, to prove He was the promised Messiah.
Now that you know what the rules are, you need to start paying attention to them. Otherwise your time here will be short indeed.
As for your claim that Catholic beliefs are based on a false gospel… actually, the authors of the New Testament draw on oral Tradition
in addition to Old Testament Scripture. In several instances, they explicitly cite oral Tradition to support Christian doctrine. Not only does this observation undermine your belief in the doctrine of Sola scriptura, but it lends positive support to the Catholic position of Scripture and Tradition as parallel conduits through which God brings us his revelation.
For example:
Scripture says that Joseph and Mary returned to Nazareth after their sojourn in Egypt, “that what was spoken by the prophets might be fulfilled, ‘
He shall be called a Nazarene.’” (Matt. 2:23). All commentators admit that the phrase “He shall be called a Nazarene” is not found anywhere in the Old Testament. Yet Matthew tells us that the Holy Family fulfilled this prophecy, which had been passed on “by the prophets.”
Just before launching into a blistering denunciation of the scribes and Pharisees, Jesus delivers this command to the crowds: “
The scribes and Pharisees sit on Moses’ seat; so practice and observe whatever they tell you, but not what they do; for they preach, but do not practice” (Matt. 23:2-3). One searches in vain for any reference to this seat of Moses in the Old Testament. But it was commonly understood in ancient Israel that there was an authoritative teaching office, passed on by Moses to successors.
“All drank the same supernatural drink.
For they drank from the supernatural Rock which followed them, and the Rock was Christ” (1 Cor. 10:4). The Old Testament says nothing about any movement of the rock that Moses struck to provide water for the Israelites (Ex. 17:1-7, Num. 20:2-13)
Jude relates an altercation between Michael and Satan: "When the archangel Michael, contending with the devil, disputed about the body of Moses, he did not presume to pronounce a reviling judgment upon him, but said, ‘The Lord rebuke you.’ " (Jude 9). … As H. Willmering says in
A Catholic Commentary on Holy Scripture, “This incident is not mentioned in Scripture, but may have been a Jewish oral tradition, which is well known to the readers of this epistle.”
There are a number of other examples in the New Testament in which the writer likely draws on oral tradition, but not so clearly in support of any doctrine. For instance, Paul dips into rabbinic tradition to supply the names, Jannes and Jambres, of the magicians who opposed Moses in Pharoah’s court (2 Tim. 3:8). In the Old Testament, these individuals are anonymous (Ex. 7:8ff.). James tells us that because of Elijah’s prayer there was no rain in Israel for three years (Jas. 5:17), but the Old Testament account of Elijah’s altercation with King Ahab says nothing of him praying (1 Kgs. 17).