I don’t understand what you’re saying is dangerous exactly, because the thread you’re replying to is full of people pointing out the ludicrousness of “terraforming Mars” compared to doing anything-at-all on Earth: pointing out the massive gulf between “massive” human impact and what is necessary for Mars (far, far greater).

I interpret this as you misinterpreting the opinions here, confusing them with the opinion of unrelated colonization-fanatics, via an unknown mechanism; I will not attempt any defense of either perspective right now.