Thats the point. It wouldn't be fair to start the discussion after that point.
Even if you are not making a religious argument, the biblical starting point is important. Whenever you hear people talk of the history of the conflict, people speak about the Zionists that moved to Palestine. There is little talk of the Jews that moved there as a holy land, nothing to do with Zionism. I don't know the numbers, but a good portion of the Jews living in Palestine prior to 1947 were not part of the Zionist movement.
Similarly, after the Holocaust, Jews tried to make their way to Palestine not as part of the Zionist movement, but simply because as Jews that's where home is.
If your argument for the conflict is a religious one then you have lost before you have begun.
Here is an interview with a historian who most here would disagree with immensely, definitely not within our echo chamber at all:
Then he did an interview with a Palestinian activist:
I'm using Coleman as I have found him to be a fair and honest speaker, and he is not someone who came to this issue with a bias. Needless to say, there is loads in both videos I disagree with vehemently, including what I view as outright lies and lies of terrible commission.