Lipschutz's offers a vision of tolerance based on a generic sense of revelation, reward, and afterlife found in all religions. Rather than approaching religions as an other, he senses a common core based on morality. If one wanted to develop an approach to non-Abrahamic faiths, then his general definitions offer a useful starting point. For him, enlightenment, karma, and reincarnation could be considered valued forms of Torah for gentiles.
Our next thinker did actually embrace the reading of works of other faiths. Rabbi Elijah Benamozegh (1823-1900) was a preacher and essayist in nineteenth-century Italy, who incorporated the new finding of comparative religion in his Biblical commentaries and who wanted to bring Gentiles, even his Christian contemporaries, back to a true universal Monotheism based on the seven Noahide laws.