1john 2:18Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time
1john 2:22Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.
1jhon 4:3And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that [spirit] of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
By this Muhammad (pbuh) must be a Good Spirit of God. The Quran confesses that the Messiah had come and that he was Jesus (pbuh). Id like to point out that not at one point in any of your references does it say that the anti-christ will say Jesus (pbuh) isn't God (swt).