"If you get divorced than you are with some exceptions a normal foreigner again."
in U.S. you will be kicked out in 24 hours, should your ex-spouse blame you in a fictive marriage solely for the purpose of getting a PR. in Germany you get your own PR in three years? of course, you have to remember that in Germany you will have to give away a very large part of your income to your ex-spouse, once you get divorced that is. it's easily explainable however, considering that in U.S. government pays almost nothing for those in need while Germany has a very profound system of social security.
however you see, everything can be used in different ways. therefore U.S. will have no problems kicking out a supposed terrorist while Germany surely will, as those people come, find a german lady that does not want to work and then they are all set, and even a new immigration law is not going to change that.
as well as natives that do not see it fair to give away so much for one mistake in their life: they usually receive "Arbeitslosenhilfe" and work "schwarz" in the same time

Some Turks btw are doing even better: they get a social aid for the whole family and work "schwarz" in the same time. which is perfectly understandable considering how many children some of them have

"It is just offering a more secure chance if someone should be in love with a native person right now."
lol should i mention here that it's not possible to marry anyone without a passport, in any country?