And what of other “western” countries? Some had it rammed down our throats by activist judges (as in the US) some by activist politicians (e.g. the UK), and others were so perverse as to actually vote in favor of it in a referendum. Why must the USA stand out?
Socialism’s poison has been mutated across the globe. In the West, it became secular and antagonistic towards Christianity; in the Middle East, it co-opted Islam with just as virulent antipathy towards Christianity (Islamic “republics” are invariably Islamic Socialist, Iran not excluded).
The bad news is that it's only going to happen after the country is filled with Mexican Muslims.