There's spiritual Jews and cultural Jews, and they are entirely different people.
But don't you think it shouldn't matter in light of their history of persecution and genocide? I can't help but think there would be a certain sympathy/empathy towards the innocents who are being led to the slaughter. Regardless of religious belief/unbelief there remains the intrinsic human element. There has to be a spiritual blindness preventing people from recognizing that when you approve of the killing of helpless unborn babies, you are, in essence, cheapening ALL human life.