Re: This is hardly a US speciality...
1) 52% voted for any number of different versions of 'leaving', depending on who they listened to.
2) 83% voted for parties supporting Brexit because it's a two party system and there's basically no choice.
3) Politicians are representatives not delegates, look up the difference.
4) YouGov issued a clarification because their poll numbers were being mis-represented to suggest a majority support 'no-deal'. The poll data does not show this.