Complex sentence: According to Kershaw, the German church leadership expended considerable energies in opposing government interference in the churches and "attempts to ride roughshod over over Christian doctrine and values", but this vigour, was not matched against all areas of "Nazi barbarism".
Split into simpler sentences: According to Kershaw, the German church leadership expended considerable energies in opposing government interference in the churches and "attempts to ride roughshod over over Christian doctrine and values". This vigour, however, was not matched against all areas of "Nazi barbarism".