He doesn't have to think. It is open US policy. Biden had multiple "slips of the tongue" where he states the goal is regime change in Russia.

Ron Klain, Biden's Chief of Staff, has said directly that he doesn't want to give Putin an "off-ramp" in Ukraine.

All actions by the US so far have been to increase violence and war in Ukraine, and zero efforts to negotiate a settlement.

I'm not the biggest Chomsky fan, but I definitely think he got this one correct.