The difference is that non-practicing Christians don't tend to cling to a Christian identity, and do tend to be dispersed in society. The Jews have nation that is build on their identity, along with the collective experience of being a distinct, unique religio-ethnic group dating back to deep antiquity.
I agree, and this plays into what both Father E. Sylvester Berry and Monsignor Dillon wrote. It seems that we look only at the titles of the books and we conclude without reading what they wrote.