(Matthew 12:46-50, NKJV) "While He (Jesus) was still talking to the multitudes, behold, His mother and brothers stood outside, seeking to speak with Him. Then one said to Him, 'Look, Your mother and Your brothers are standing outside, seeking to speak with You.'
"But He answered and said to the one who told Him, 'Who is My mother and who are My brothers?' And He stretched out His hand toward His disciples and said, 'Here are My mother and My brothers! For whoever does the will of My Father in heaven is My brother and sister and mother.'
Also, Jesus said, Matthew 13:57 And they took offense at him. But Jesus said to them, "Only in his hometown and in his own house is a prophet without honor."
Could it have been that his own half brothers and sisters didn't believe He was the son of God? Could some of them have even been jealous of Him?
“But He answered and said to the one who told Him, ‘Who is My mother and who are My brothers?’ And He stretched out His hand toward His disciples and said, ‘Here are My mother and My brothers! For whoever does the will of My Father in heaven is My brother and sister and mother.”
The word that is translated as ‘brothers’ is actually adelphoi in the Greek. Exact same as in Philadelphia, (Philo-adelphoi), city of Brotherly love. ;)
You can check it out for yourself. Adelphoi isn’t limited to ‘blood brothers’. That’s not how the Greek word is used.