I think you're making the mistake that any of their points are cogent or intended to function as proper arguments. It's just bullshit chaff to make you waste time, and provide a patina of legitimacy for the fact that they really just want the US to be an ethnostate and will adopt whatever policy stance is convenient to that end. Note how at the start they're complaining about tax-dollar spending, and then later in the thread they hit you with "My concern goes far beyond monetary cost, the problem is really [SOME_OTHER_BULLSHIT]". There's no consistency; it's just sound and fury, signifying nothing.

I am aware of this. I just don't see what else to do.

1. I actually believe in many of these lofty ideals that are being dishonestly abused by the fascists.

2. Discussing things in terms of abstract ideals is a Schelling point that at least creates a chance for people from disparate tribes to find common ground.

3. There are other people reading along that might be swayed by the disingenuous chaff standing unquestioned.

4. I'd say it's going too far to write off most people spouting this nonsense as fully consciously aware of a contradictory agenda they keep hidden. I'd say it's more like they bought into feel-good nonsense posed as opposition to the blue head of the authoritarian hydra, and then basically haven't examined it too hard. And I'd say much of the opposition groupthink framed in terms of directly clashing overt values doesn't help either. So I think it's valuable to point out the glaring hypocrisy even if many of them have learned to revel in it.