"Would this be the same Khmer Rouge apologist Chomsky who claimed that refugees from the Cambodian genocide were "unreliable""
No - it would be the same highly respected Jewish intellectual who has been a long term victim of Israeli propaganda by such organisations as 'The Anti-defamation League'
You forgot to mention the 'respect' in which the ADL is held outside the propaganda circles

"Chomsky is one of the most cited scholars in human history, and has influenced a wide array of academic fields. He is widely recognized as a paradigm shifter who helped spark a major revolution in the human sciences, contributing to the development of a new cognitivistic framework for the study of language and the mind. In addition to his continued scholarly research, he remains a leading critic of U.S. foreign policy, neoliberalism and contemporary state capitalism, the Israeli–Palestinian conflict, and mainstream news media. His ideas in these areas have proved highly significant within the anti-capitalist and anti-imperialist movements, but have also drawn criticism, with some accusing Chomsky of anti-Americanism and alleging that he is sympathetic to terrorism and genocide denial."

"Academic achievements, awards, and honors
In 1970, Chomsky was named one of the "makers of the twentieth century" by The London Times.[163] In early 1969, he delivered the John Locke Lectures at Oxford University; in January 1971, the Bertrand Russell Memorial Lecture at the University of Cambridge, titled "Problems of Knowledge and Freedom"; in 1972, the Nehru Memorial Lecture in New Delhi;[270] in 1975, the Whidden Lectures at McMaster University, titled "Reflections on Language";[111] in 1977, the Huizinga Lecture in Leiden, titled "Intellectuals and the State"; in 1978, the Woodbridge Lectures at Columbia University; in 1979, the Kant Lectures at Stanford University;[270] in 1988, the Massey Lectures at the University of Toronto, titled "Necessary Illusions: Thought Control in Democratic Societies"; in 1997, The Davie Memorial Lecture on Academic Freedom in Cape Town;[271] in 2011, the Rickman Godlee Lecture at University College, London;[272] and many others.[270]
Chomsky has received honorary degrees from many colleges and universities around the world, including from the following:"
Both from his Wiki entry
Jim Carroll