Yes Europeans are jaded, but I cannot see a way for Europe to renew itself if the spread of atheism and agnosticism continues. I believe that one generation brought up with religion can become atheist and remain largely moral (not knowing or crediting the source of their moral sense) but not subsequent generations. Christianity is there for Europeans to return to when they choose.
As to the second question, it is not only that Jews in Europe are numerically insignificant today (with the exception of the UK and France), but they also are dwarfed everywhere by the number of adherents of Islam. The effort of integrating Europe's Moslems into society (probably by establishing some kind of Euro-Islam, with heavy government involvement) will be a project that will consume incredible effort and energy during the next decades, and a successful outcome is by no means assured.
In addition, I see a difference in how Christians in Europe and Christians in the U.S. feel about the Jewish religion. It seems to me that "replacement theology", the idea that Christianity has superseded and obsoleted Judaism, is more common in Europe than in the U.S.
Hence you hardly hear Europeans speak of "Judeo-Christian values", for example, but in the U.S. this is quite common.