But the US support for dictatorships hasn't changed between Obama and Trump (or Biden). The US will support any dictatorship that furthers US interests and will oppose any dictatorship that does the opposite.
Thus it's perfectly valid to say that it's never about whether it's morally right to support dictatorships. China is disliked by the US because it's a threat to America being #1 economically, not because it's a dictatorship. The same is true for human rights abuses, of course.
Individual politicians might have certain morals or values. I really believe Obama wanted to close Gitmo but if you look at the results, they're absolutely predictable and not at all based on any morals the US claims to have.
I think your first sentence is strictly false. For easy counterexamples, the US changed its policy towards both Cuba and Venezuela from cooperation/reproachment to outright hostility if not regime change between the Obama and Trump administrations.
Thus it's perfectly valid to say that it's never about whether it's morally right to support dictatorships. China is disliked by the US because it's a threat to America being #1 economically, not because it's a dictatorship. The same is true for human rights abuses, of course.
Individual politicians might have certain morals or values. I really believe Obama wanted to close Gitmo but if you look at the results, they're absolutely predictable and not at all based on any morals the US claims to have.