Luther taught heretical views on salvation. The Church’s practices weren’t taught; even if wrong, it wasn’t a dogma that you had to buy an indulgence, only a personal sin.
The pope in gold plated armour isn’t 100% sure, but even if he did indeed, it was in accordance with his time of war, and had he sinned graviously by doing so, it was his personal sin again not a teaching of the Church.
Had Luther done what he had to do to correct the Church abuses that you mention, he would have been a Catholic hero, and would be remembered in stamps and probably made a Saint. But He taught Sola Fide, was openly against the pope, mutilated the Bible, well…
Since the Pope excomunicated him, he left the Church, and didn’t want to come back.
“Jesus does not lead people astray, but people lead others astray as many in the Church did over the centuries including our own time, with the sex abuse scandal that has rocked the Church.” Exactly, not the Church, people, like Luther, like Arius, like the JW, bad bishops, …
“Should we be so proud of our religion that we reject this ?” But we don’t. I am not against Lutherans at all, but against Luther, in the same way as I am against Mohammed and Islam, but I love Muslims. I don’t want a stamp of Muhammad because there has to be a dialogue between us.