I don’t think this dumbass knows what the Immaculate Conception is. He seems to be using the term to refer to Mary conceiving Jesus by the power of the Holy Spirit.
Nice catch on your part. I think that that is exactly what this blithering idiot is referring to. The conception of our Lord is not referred to as the “Immaculate Conception”. I don’t even think that that term was used by the Church until after the miracle at Lourdes for crying out loud!