He says he is a Protestant, and he probably identifies as one. He may believe he believes in Jesus Christ, but does he actually believe, or is he just fooling himself? Can you even know if you genuinely believe in something, because you are always the easiest person you can fool?
There are many doctrinal differences between different branches of Protestantism. Lutheranism teaches that while good works do not imply faith, faith does imply good works. The absence of good works can therefore seen as evidence for the absence of faith, from that perspective.
There are many doctrinal differences between different branches of Protestantism. Lutheranism teaches that while good works do not imply faith, faith does imply good works. The absence of good works can therefore seen as evidence for the absence of faith, from that perspective.