So a thought experiment: If China were to put out a warrant for Trump's (the most unpopular president in US History, someone the majority of Americans disapprove of, a convicted criminal, and a pedophile who raped young people and has not been brought to account for these crimes as of yet) under the pretense that some of his victims were Chinese nationals and then invaded the Whitehouse to forcibly remove him to China, would that also be legal and justified ? What would you expect the reaction in the US to be ?

To be very clear I do not support this -- out leaders should be held to account to their people, not foreign invaders deciding for us. Even if it seems unlikely that they ever will be, it's our process and people.

This argument doesn't really hold water because the jurisdiction of a nation isn't the whole world.

If we have a warrant for a Sovereign or someone else with Diplomatic Immunity we -- at the very least -- should not invade their territory to carry it out. That's not how the civilized society works, and that's not how we want it to work as evidenced by the thought experiment above.

If we are at war with a nation or people, and reject the premise of their fundamental sovereign or diplomatic nature of course it's a different story since we are talking about a fundamental disagreement of reality. There's a separate process for that weighty decision by the US people's representatives.