I think you'll find the ATACMS missile guided itself, based on inertial navigation and satellite positioning data. If your argument is that the United States guided the missile because the US provides GPS, that's a pretty flimsy argument.

Why do folks like your self make such foolish analogies? If the US had invaded Mexico like Russia invaded Ukraine then yes, it would be completely fine for Mexico to fire missiles into the US.

Imagine the absurdity of if China put missiles on the Mexican border ...

Imagine the US engaging in an invasion of Mexico as equally stupid and unprovoked as Putin's invasion of Ukraine. Then not only would Mexico have a perfect right to seek whatever help it needed to resist the aggression directed at it, we would -- unless we were damned fools -- fully expect Mexico to seek and obtain that help.

As far as we know Ukraine both put them there and guided the missiles. Please provide proof otherwise.