RUFFHAUS - some would argue that imposing a nation of refugees in the semitic inhabitants of the area to be a highly anti-semitic act in itself, naturally tainting any subsequent interactions between that state and other inhabitants of the region :p
While the electoral college would, on paper, work the same way if there were multiple parties, it (as with every single representative, first part the post system) encourages local elections to be between two candidates only - any others detract from an otherwise preferable candidate. While I'm generalising this effect over each election, and assuming the same parties being those two (which I believe I'm jutified to do with regard to the USA, given, you know, that's /exactly how it's happened/) I'll cede it's not always the case - eg. in the UK, in Scotland the Scottish Nationalist Party is typically one of the two parties actually in contention, while elsewhere the split is more commonly Tory/Labour.
But for the USA, I'll accept that the system as it is (regardless of what the rules are on paper, which is all you appear to be arguing?) doesn't actively discourage third parties as soon as you can point out a third party that actually has representation remotely proportional to its voter base at a federal level ;)