Did the Data Center get canceled? If not, then no it is not ruined and instead what's going to happen? Is someone's going to scrape up a whole bunch of that concrete releasing a whole bunch of carbon dioxide and then someone's going to pour down some more concrete which will increase the CO2 in the atmosphere.
That's for all cement in the entire world, not one data center. This math is not hard. Plastic is roughly 5% of our emissions but you would not point at one straw and say it is worth 5% of all emissions.
Yes, because it's a matter of scale. Napkin estimate that you can do at home is that there are about 2.7b buildings, and half of them use concrete. 8/1.35b = 0.000000001~%. Compare that to 12,000 data centers polluting 0.1% of us. 0.1/12000 = 0.000008~. That's 8 zeroes past the decimal vs 5, so right off of the bat we can see that a completed data center is thousands of times worse than a concrete pouring.
The buried ledes here are firstly that a concrete building is a one-time thing, where once it's built it is built and that's that. (The 8% of pollution is a yearly recurring thing from the production of concrete, but an individual concrete building is done polluting once construction is finished.) On the other hand, an AI data center contributes its pollution every year continuously forever.
Secondly, the matter of scale. Concrete took billions of buildings to get to its share of the pollution done. You will be hard pressed to find anything in the world period that can be produced at that scale without causing significant pollution. It's almost miraculous that it's only at 8% globally, especially when compared to AI data centers, of which there are only 12,000. You could build a dozen buildings out of concrete every day for the next 40 years and on a global scale you would not move the needle on how much pollution concrete is responsible for. Do the same with data centers and while the math is a bit harder you will wind up being responsible for ~30% of the pollution on Earth.
That sounds likely to be true. They'll move operations to a temporary building while they build a new one. To some extent their ability to make plans will be disrupted, but the effect those plans would have had on the climate is unknown: the result is just that the oil company behaves in a more stupid and poorly-planned way, while doing some extra construction.
Reading between the lines, you're proposing a kind of all-out war between, on one side, all the oil companies and other industries, and on the other side, a bunch of annoying dweebs who throw soup. I encourage this, I think it would be interesting to find out what happens.