Complex sentence: Hitchens describes this as a "great cult of noble, patriotic death" (for which monuments can be found all over Britain) and asserts that the only comparable cult occurred in the Soviet Union.
Split into simpler sentences: Hitchens describes this as a "great cult of noble, patriotic death" for which symbols can be found all over Britain. Hitchens asserts that the only comparable cult of heroic death occurred in the Soviet Union.