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Let say Jews faith successful survival what effect had on World history I am no way suggestion super longer number more suggestion few thousands Jews living Japan European Christian first show up.
I think Japan response still been close door policy or worst. Jews Europe face much worst maybe in Americans as well.
Reasons it very simple Japanese JEws likley adapt Japanese culture include find justification for rituals suicide and much more war like or welling fight. Rabbi in Europe looking them not practice religion right. Jews putting down presser to Emperor Japan adapt close door policy might challege Jews defends themselves Europe which could lead Japan allow Jews merchants in and out.