How do we know that a non-publicized event similar to the holocaust isn't happening in another country today? If we were in 1942, would we really be having this problem carding and asking every fleeing Jew for proof of citizenship? Would we be deporting them back to Germany? We wouldn't, would we?
The United States needs to be more strict on getting rid of the illegal immigrants because a good amount of them are trafficing drugs and other harmful things, but it should be easier to become a citizen especially for those in a country who is at war or in a bad environment.