Even your 'Mexonline' site describes the exact process I did. The american never actually owns the land in that instance, it's an established mexican trust that technically has a Mexican owner.
Great, someone found a loophole and officials have allowed it to slide to encourage investment. At no point in a process does it change the fact that an american can't legally own land in mexico, it just means that someone found a way around the law via Mexican corporate structure.
Once again how does this change the core issue
a) Everyone else in the world has to play by the rules why do you think mexicans don't. They sure as hell don't return the favor if we enter their country illegally.
b)
if you think america or any country can absorb an unlimited number of immigrants, legal or not every year, you better start asking yourself what people are going to do when there are more people than jobs. especially when jobs are leaving north america at record rates right now.
We can barilly manage to provide for our own citizens, trying to go even further is just going to hurt everyone in the end as we simply don't have the resources.