"A prophet is not without honor except in his native place and among his own kin and in his own house." So he was not able to perform any mighty deed there, apart from curing a few sick people by laying his hands on them. He was amazed at their lack of faith. Mark 6:4-6
The knew him as the Carpenter's son, they did not know he was God's Son, his own family knew. They supported his ministry. But the towns people lacked faith in him, they judged him as a carpenters son, not as a prophet. They only saw the before and not the after.
It's like us in a sense, what we do as a young person reflects on who we become. Or who our parents are and their role in our life. If Joseph was a Merchant then Jesus would have been known as the merchant's son. If God chose to reveal the gifts of his son, before it was time then the people would have come to recognize his Divine gift. But God does things for a reason. For us to understand, that no matter who we are or where we come from, or where we go, we are all God's children given a gift to help others along our path. When we have poor in our own communities, and refuse to see and help them. Unlike Jesus, he went to his home town to help them, but they lacked faith in him to bring healing to them, to set them free.