Luther may have been forgiven officially but clearly not all Catholics have gotten the message.
Does that mean they are poorly catechized or sinning by holding a grudge or out of communion with the church for rebelling against its authority?
Some of them sure seem to have a lot of hatred for someone who has been dead for centuries. It can not be changed, so get over it. He did what he thought was right and very few do that. I applaud that.
This Day in History, Jan. 03, 1521
http://www.history.com/this-day-in-history/martin-luther-excommunicated
Martin Luther, the chief catalyst of Protestantism, was a professor of biblical interpretation at the University of Wittenberg in Germany when he drew up his 95 theses condemning the Catholic Church for its corrupt practice of selling indulgences, or the forgiveness of sins. He followed up the revolutionary work with equally controversial and groundbreaking theological works, and his fiery words set off religious reformers all across Europe.
In January 1521, Pope Leo X excommunicated Luther. Three months later, Luther was called to defend his beliefs before Holy Roman Emperor Charles V at the Diet of Worms, where he was famously defiant. For his refusal to recant his writings, the emperor declared him an outlaw and a heretic.