One of my favorite tropes from old Westerns is the town Madam, who you would think would be just coarse and vile... but ends up really being one of the good guys and helps the heroes out. It is the proverbial "Hooker with a Heart of Gold."
The only thing is... well... it's nice that she's nice and all, but she's still got a really lousy job that is problematic.
If you can make this distinction, then you can understand the Lutheran position on the Papacy being the Antichrist. We say nothing doctrinally about specific popes - they may indeed have hearts of gold. I liked, as a guy, Benedict XVI, and I hope Francis is a decent fellow as well. But the simple fact of claiming to have the authority of the papacy is... anti-christ. It robs Christ. It clouds the Gospel under a veneer of works and obedience... and that is sad.
And thus, as always, I will pray for repentance, for myself and for all.