The Zoroastrians should come together. The religion of Judaism has survived from the same tactic for thousands of years. If it has worked on one ancient religion, why not another? The tactic keeps Zoroastrians together, insuring that children grow learning their religion thus increasing or maintaining growth.
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Sorry, two centuries ago your butts were kicked out of Rome by the Xtians and you wound up in Moldavia without a paddle. Besides, all the land is taken, the Jews got lucky after WWII, and you are not lucky. Where are you going to steal land? Good luck with that, it won't happen.