If I feel that something is morally wrong, and the Torah says it is morally right, than I am mistaken, not the Torah. Because, you see, Judaism is the word of G-d. The Laws of the Torah make provision for all future contingencies, and thus changes have never been needed. No human being could devise a system so perfect that it never needs to be changed. Thus, it is outside of the experience of most people.
Many people mistakenly think that our life or culture is static and unchanging.
To the degree that it is static, that is good. It means that we have been keeping our morals, and have not been assimilating. But even Judaism takes into account the changes and tides of societies and peoples. Judaism is not inflexible. Judaism takes the perfect balance between firmness and flexibility.