The main reason for supporting circumcision in this article seems to be that circumcision sets Jews apart from gentiles--and the American Jewish community is referenced often. But this is not the case in the United States where most male children are circumcised. This was also the case of Abraham in ancient Canaan. The Canaanites circumcised their children before Abraham did and when he did, he fit right in.
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from the article: Thank God for circumcision