Complex sentence: While the Church ultimately failed to protect its youth organisations and schools, it did have some successes in mobilizing public opinion to alter government policies--as in the case of the attempt to remove crucifixes from German classrooms.
Split into simpler sentences: While the Church ultimately failed to protect its youth organisations and schools, it did have some successes in mobilizing public opinion to alter government policies. As in the case of the attempt to remove crucifixes from German classrooms.