@kravietz
That Wikipedia section does not provide any evidence of Chomsky whitewashing the Pol Pot genocide; it only provides evidence of people trying to claim that. Look at Chomsky's books themselves rather than how people try to interpret them.
The image of text you've pasted is not denying or whitewashing the Uighur genocide.
The text is missing context (interviewer? audience?), but presumably it's to a US audience, holding more political responsibility in Palestine than in China.
@kravietz
"This very comparison... kind of conditional ..."
This reading between the lines disagrees with Chomsky's clearly stated motivation. His consistent line over many decades is that he does not deny that genocides are carried out by "official US enemies". Instead, he sees his moral obligation as focussing on genocides and crimes against humanity done by or indirectly by his government, for which he holds (some) moral and practical responsibility.
That is not denial.