How will the US Govt ever be able to criticise a foreign regime that uses torture as part of its methods to extract confessions?

They will do it selectively as they have always done. When it suits their purposes, they will use torture as one of their excuses for using aggression against other nations. And when it suites their purposes, they'll gloss over the use of torture by countries who are willing to do their torturing for them. 'Twas ever thus.