Every political position mostly tries to define in which ways violence is to be used. Realising this and knowing power is already established before you were even born. Seeing violence being used against your oppressor(s) is often times the only thing we feel we can still hope for.
Or from another perspective, is the war in Ukraine worth it for Ukraine or Russia, can you really say a war with so many deaths is preferable to being a russian subject, or an international embarrassment of the Russian state. Is the self determination of Palestinians really worth the terror and the war. We're the PIRA justified in bombing London for their brother's and sisters discrimination and deaths in Ireland. It's ultimately all subjective, wether the violence of the system you fight against is bad enough you can bring yourself to fight.
Nothing brings back anyone but as long as there are people who want to, and do turn us into their machines, we have to rely on our interpretation of that being wrong, and fight them for it.
The thing is that culture with a shared language will homogenise or just be way more homogeneous than without one. Same for culture inside a shared nationality. This further perspective shift acquired via engaging in more different culture is useful, especially I find for critically evaluating news, politics,media and the like.
The perspective told in any other language than English is less sometimes much less integrated into the hegemony associatet with English. And seeing hegemony is much easier if you can by way of language switching step out of the one you've previously lived under.
There are of course other ways for this kind of perspective switching than learning a language, but having it be such a natural part of your life is in the long run easier.
So from the perspective of an education system in a supposedly democratic society what the op argues for makes a lot of sense, starting early with a 2nd language would likely make the US school system better. And I mean really early, nowadays here we start the 2nd language education with first grade, and the 3rd language with 5th grade.