So, the fact is that lots of people thought that the Man in the Doorway was Oswald- despite official pronouncements to the contrary. And notice the reference to Marguerite Oswald.
As you know, I don't think that that old woman, who looked about 70, was the biological mother of 24 year old Lee Harvey Oswald.
But, I don't doubt that she raised him and acted like his mother. So, who better than his mother to pick him out in a picture?
People from all over realized that Oswald was the Man in the Doorway, and that included the people who said so and a whole lot of people who didn't- for fear of their lives. It has truly reached the point that denying it any more is just plain ludicrous. It's Oswald. It's Oswald. It's Oswald.