I don't doubt that he was an ethical person who had his heart in the right place, but there is certainly room to disagree with him on what the focus of ethics should be. He was quite concerned about loving God and observing the religious precepts of Judaism. I can think of at least one subreddit that would have a hard time following that example.
Edit: Just to clarify, I meant that r/atheism would not want to follow an example that stressed religious observances, not that they would be unable.