What the fuck did Greenland do to deserve this?
It likely has a lot of mineral wealth. It's best to get control of that wealth, before some dirty locals try to setup their own government with rules about respecting them, their culture or property.
/s on that last bit, for the terminally stupid.
Ya, the real problem is that it doesn't. As specifically stated by the CRS:
And that difficulty is why that whole document exists, there isn't clear legal guidance. And the historic precedents on it are a mess. Yes, either house of Congress has the power to refuse to seat a member of their respective house and have used the 14th Amendment as a reason in the past. Moreover, Congress could pass a law which sets out a legal framework; but, that's not really happened either. The whole reason that this is even a discussion is that lack of clarity.
Arguably, Congress did try to do something, the House Impeached Trump. The Senate dropped the ball. And the American people then buried that ball far enough to interfere with Satan's daily activities by re-electiong Trump. It's a bad situation, but also not one we're going to solve by misrepresenting the law. Especially by handing The House the sole power to determine what Presidential Candidates have engaged in insurrection by a simple majority vote (the requirement to impeach). If you want to bring up "devolution of norms", that sort of power is going to take the cake. Anytime we have a split government, we're going to see impeachment and barring from office on the flimsiest of excuses. What we need isn't half-baked ideas but an actual, well considered framework.
I think it's down to you moving the goalposts. You specifically stated:
You are arguing that the House Impeaching is enough to trigger Section 3 of the 14th Amendment. Which is what I'm calling ridiculous. Trump being convicted by the Senate would have clearly barred him from holding office again. The reality is that he was acquitted. That's the part which is actually important.