Complex sentence: Abbas misquoted historian Raul Hilberg to support his claim that fewer than one million Jews were killed, and quoted Robert Faurisson on the nonexistence of gas chambers.
Split into simpler sentences: Abbas misquoted historian Raul Hilberg to support his claim that fewer than one million Jews were killed. Abbas raised doubts regarding the existence of the gas chambers, quoting Robert Faurisson on the nonexistence of gas chambers.