Did Jesus’ Family Think He Was CRAZY?

If the virgin birth really happened, then why did Jesus’ family essentially call him crazy? After deep study in the Greek text, it turns out that we may have this all wrong.
Questioning Christmas: Did Matthew Mangle the Virgin Birth? Responding to Bart Ehrman | Ep 70

Bart Ehrman claims the New Testament author Matthew did not understand the Hebrew or context of Isaiah 7, the famous “virgin birth” text. Does he have a point?