Zionism was originally a rebellion against religious Judaism and the PLO Charter was essentially secularist. But because the conflict was allowed to fester without a resolution religion got sucked into the escalating cycle of violence and became part of the problem.
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When asked if I consider myself Buddhist the answer is Not really. But it's more my religion than any other because I was brought up with it in an intellectual and spiritual environment. I don't practice or preach it however.