While I don’t totally disagree with you, nor advocate the position you are arguing against… I wonder what is the scientific definition of sanity? Is there a consensus on it? If it is a concept that exists outside the context of our society as you claim, then is it something objectively inherent in all humans regardless of their culture or circumstances? Or can its meaning change over time; can the standard of entrance be lowered or raised depending on current trends or the whim of the majority?
Zionism was not started by Ottoman Jews, which were a very, very small minority in Palestine. The grandfather of Zionism was an Austro-Hungarian, Theodor Herzl. Before that there was a proto Zionist movement the Hovevei Zion which was created in response to pograms in the Russian empire. The Zionist movement was entirely created as a response to the treatment of European Jews by European powers.
Living under sharia law and being treated as a second-class citizen (which all non-Muslims were) certainly was not ideal for Palestinian Jews, but hundreds of thousands of European Jews did not start streaming into Palestine because of that.