Is it possible for a theistic religion no matter how liberal its doctrines to be truly humanistic? I have a close friend who's an ardent Reform Jew and who strongly believes that the two thought systems are indeed compatible. In fact one reason for his dedication to Reform Judaism is its enlightened concern with the human condition instead of on rigid observance and ritual as is the case with Orthodox Judaism. Personally, I admire Reform Judaism for its historic attachment to progressive causes.
But in the final analysis as long as Reform Judaism and other moderate forms of religions have a theistic component, I don't see them as being fully humanistic. Here's why. There's a conflict between humanism which by its nature is secular and traditional religion. Humanism of course as the name implies is a perspective on life that's human centered, one that enables people to grow and unfold their powers to understand the world around them and be able to relate to their fellow humans. (BTW I credit my perspective on this point to the influence of humanistic psychoanalyst Erich Fromm)
Theism on the other hand is is god-centered. As such it requires people to look to a supreme being, whose existence is unproven, for the answers to life's questions. This limits their horizons of searching and awareness to the confines of this deity's dictates.
As Richard Dawkins said "I am against religion because it teaches us to be satisfied with not understanding the world". Inasmuch as theists tend to address human needs in terms of such archaic concepts as the soul and man's relationship with God, the same is true about religion's limited approach to humanity and humanism.
