He lived in an anti-Semitic society and you’re judging him by the standards of today. I could easily find another 20 very prominent people in history that were deeply flawed. That does little or nothing to their contributions to society. And surprisingly, you don’t get to judge who is and who isn’t a Christian. Nice try, though.
That is why I use the Bible as my guide, not sinful men. It is offensive to hear of people glorifying Luther, Calvin & other wicked men. They were no saints, not even close.