“Oh, hooey! When you insult the Mother of God, you ARE insulting Jesus Christ. That can’t be that difficult to figure out.”
By that definition, every time you insult a Christian, you are committing blasphemy.
Mar 3:32-35 And the multitude sat about him, and they said unto him, Behold, thy mother and thy brethren without seek for thee. (33) And he answered them, saying, Who is my mother, or my brethren? (34) And he looked round about on them which sat about him, and said, Behold my mother and my brethren! (35) For whosoever shall do the will of God, the same is my brother, and my sister, and mother.