Some today do not believe that Jesus' brothers and sisters were children of Joseph and Mary.?

This is a perfect example of misreading or you could call selective reading, the Bible states that Mary was a virgin and would stay a virgin until the birth of Jesus to fulfill a Bible prophecy. Once it was filled, there was no need for Mary to stay a virgin. Joseph did not touch Mary until after Jesus was born. If you recall Joseph was going to divorce Mary secretly, if he never planed on having with her then why divorce her? The scriptures state this as already shown, but when your dealing with blind minds the truth gets distorted, that's why false religion is called a Harlot, she will adulterate with pagan rites, festivals, and pagan gods. This Harlot's pagan roots go way back some 3000 years before Christ there was the trinity, immortal soul, hell fire, the pagan goddess easter, the cross, and the blessed mother and child worship. This is easily proved in the history books, but the blind can't read which is evident by all the paganism in the churches today. They don't care if the trinity is not in the Bible, they don't care if it started with pagans, and Satan laughs at them because he's doing what 2 Co 4:4 says, he's blinded their MINDS!