I live in the USA and would feel this way too about Trump if I didn't know people who lived in the interior. I live in the Los Angeles metro, which is one of America's "alpha cities."
London and other major global cities have formed something almost akin to the science fiction concept of a breakaway civilization. They are their own global meta-nation. Meanwhile the interior and rural districts of their own host countries have been in a state of permanent depression for almost two decades now.
Not saying the conservatives or Trump will fix this. They're political opportunists riding a wave of dissent. All Trump had to do to get elected was to style himself the opposite of all the values and ideas popular in global Urbanity. One of the most insightful comments about Trump I've read was that his racism was more intended to offend educated white urban coastal liberals than to offend non-white races.
From what I can see Brexit and this stuff is the same.
It's a "fuck you" vote from the forgotten districts.
Edit: required reading: