How we should calculate this, well I believe it should be based on the total contribution of the people in everything: Science, Healthy, Economy, Technology, Culture, Education, etc.
After doing the math I come to the conclusion that every one Israeli equal 5 million Arabian - Yes collect 5 million Arabian and they overall contribution to the human being present and future equal one Israeli contribution.
Someone could say: Arabian have a lot of illiteracy, my response is: Bullshit. Instead of saying that, ask yourself did you done anything about it?
However if we excluded the illiteracy, the number will be ~3 Million Arabian equal one Israeli
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If this post hurt your feeling, so you might start work. Or you can continue deny the facts.