Immigration reform is a delicate subject. Unfortunately, Man Comics' idea of delicate is screaming that your mother is pretty while it drives over her with its dick truck. Man Pounding Action! Political Discourse! Rarrrgh! Man comics!!!
Sometimes it's just a matter of making the US Department of Defense look, like, REALLY cool.
Actual impending doom like global climate change or mass extinction just makes people bored.
In some cases, the Marvel source material just did better.