First off, this whole question is based on a hypothetical - what if Mexico denied citizenship to children born of Mexican parents outside of Mexico. I don't think there's any nation on earth that would ever do that, so it's a moot point.
Either way, the child isn't being punished, but simply not being rewarded. There's a difference.
The child is being punished. If you are not a citizen of any country, where can you be deported to? And it is possible- you can't guarantee that every country's laws will match up so that every child is a citizen of somewhere.
The child didn't do anything illegal, and in this country we do not visit the sins of the parents on the sons.
First off, this whole question is based on a hypothetical - what if Mexico denied citizenship to children born of Mexican parents outside of Mexico. I don't think there's any nation on earth that would ever do that, so it's a moot point.
I agree that it's a hypothetical, but it's still useful in exploring exactly what we're talking about. It's not likely, but it's conceivable.
Consider "The Terminal" - lousy movie, but interesting thought. The Tom Hanks character was left without a country - his home nation no longer existed to take him back. That situation is certainly possible.
And before somebody accuses me of blending reality and fiction, the film was based on a true story.
Either way, the child isn't being punished, but simply not being rewarded. There's a difference.
Here I must emphatically disagree. Citizenship isn't a "reward," it's a right. Not a treat for the government to grant or withhold on a whim.