Holding to the gospel does not save anyone.
If you do not agree that believing that for the sake of Jesus, without your merit, you have a gracious God and forgiveness of sins, you should really look into Roman Catholicism.
I don't think re-writing the ten commandments and calling for the outright murder of Jews are secondary issues.
He did neither. Have you ever actually read "Against the Jews and Their Lies"?
He advocates the "get them out of business (e.g. money lending) and put them on farms/expel them" view, that had actually been done them in other times/places, and also destroying synagouges and Jewish books, not exterminating them.
He wasn't a proto-nazi, he was acting in the long tradition of Christian anti-semitism.
Which is why I'm confused he is given such leeway by the church today.
What are you talking about? His anti-semitism is widely condemned.
I think something you might be forgetting is that people are a product of their times too. In the 16th century, pretty much nobody was a big fan of the Jews.
"and you say, ‘If we had lived in the days of our ancestors, we would not have taken part with them in shedding the blood of the prophets.’" -Matthew, 23:30
You're a product of your times too. Remember, you are so bent out of shape over "Against the Jews and Their Lies" but not the far more violent "Against the Murderous Thieving Hordes of Peasants" .