Sure, I don't disagree with you on that point at all - but for every 1 of those there are 10 (100? 1000? more?) who aren't like that but who, given what was effectively a binary choice, voted the same way that they did.

The die-hard (blind) fanatics on either end of the spectrum don't make a big enough group to win an election, but the assumption that they are representative of everyone in that group is incorrect and - maybe more important - counterproductive.