One point that is always good to remember: even if Luther did believe this, it makes no difference to Protestants. Luther wasn’t the “Pope of the Protestants”, pronouncing doctrine that we all follow. He could believe whatever he wanted about Mary, but if he could not support it with Biblical evidence, then nobody has any compulsion to join him in his belief.
Even if Martin Luther believed in Mary's immaculate conception, the Reformation does not suffer loss. Neither myself nor the Lutheran church considers Luther to be an infallible source of either interpretation or revelation. However, my Romanist friends need to do a little better at proving Luther believed in the immaculate conception of Mary.
The point is the Roman Catholics here, and out in the real world, think they are playing "gotcha" with supposed Luther quotes. Most of the are wretched out of context. The point of my posting this article is to refute one of their straw men.
Well said.