So what?!
All the good stuff came from the schizophrenic leftovers of Judaism and all the bad stuff from the horrible Avoda Zara. Easy as that.
The end.
P.S., “Secular By Design” quotes Hirsch, Collected Writings, Vol. VII, 76:
“Where among the spiritual treasures of modern nations and modern civilizations is there anything true and noble, good and beautiful, anything truly conducive to human happiness that cannot be traced back, directly or indirectly, to this sacred literature? Modern European civilization is the child of Hebrew and classic antiquity. Wherever we behold truth clothed in the beauty of form, we behold a joined product of Hebrew thought and Hellenic sensibility, Hebrew truth and Hellenic esthetics.”