No, it wasn't. If that was the discussion, he wouldn't have asked the question because we already know the answer. I don't deny that I have morals that are partially grounded in Judeo-Christian ethics because of where and how I was raised.
People ask questions that they know the answer to all the time, especially if they are trying to lead you to think about specific things or try to make you come to a certain conclusion. Nothing unusual about that. Then again, maybe he was genuinely curious.
More, if your morality is so based in the religion and moral culture of your society (which is, of course, true for all of us), are you really defining right and wrong by thinking for yourself? Obviously you differ with some interpretations of morality that comes from the bible and the non-biblical traditions surrounding the majority religion - which is equally true of its practitioners.
I recent the implication that I and the others who try to leave religious or personal philosophical world veiws out of our politics are just in denial and we really are just bad Christians.
Does
anyone leave personal philosophy out of politics? If so, I have never seen it and I am not even sure that it would be a good thing. Nearly everyone believes some morality should be imposed on others and other morality that should remain a personal decision.
As to just being a "bad Christian," if your morals aren't grounded in Christianity at all then of course you aren't. However, at that point the original question of whence comes the irreducible axioms of your morality becomes entirely appropriate. If you admit your morals are rooted in religion, then the question of the basis of your disagreements is equally apt. That is not to say that religious folks couldn't be asked to justify some of the extra-biblical origins, strained justifications or neglected components of their own moral code.
All that to say, I'm not sure why you would get huffy about anything that has been said or asked. If you take pride in the fact that you have generated your own moral code through introspection and thinking for yourself then being asked to share the rationale behind it isn't a slight to you. If you have a foundation in Christian morals but have improved them through original thought then again, asking the genesis of your tweaks as well as the reasoning behind what you leave unchanged isnt a criticism.