There is no good economic reason to colonize other planets. We have plenty of space here on earth, with conditions already much more hospitable than that of mars - deserts, for example. The resources needed to turn these into habitable land is so much less than the resources required to make even a tiny part of Mars inhabitable (i.e. establish a colony that relies on life support systems) it’s insane to go for Mars first. The reason colonizing Mars is talked about at all is because a rich white dude wants to go to Mars, since deserts are too boring for his spoiled ass.

I actually agree that it would be cool if we went to Mars. But comparing it to white pillaging of the Americas is just incorrect. Mars is not inhabitable by humans, the americas very much were.