Anyone who loves a bit of history as I do, think its far more complex then that. The UK had never been European in the first place. Since Roman times a strong Europe (or part of Europe) was always bad news for them while a fragmented Europe had allowed the UK to prosper through trade, dominance over the sea and colonialism. Its within the UK people subconscious to hate the very concept of a strong Europe as its within the European psyche to hate/be scared shit of a strong Russia even though, most of the time, a strong Russia had been good for Europe rather then a hindrance (It did stop Napoleon and Hitler and when it wasn't able to stop invaders ie like the mongols or the huns, Europe got hurt big time).
Brexit is just another attempt to break the EU down but here's the catch. Instead of breaking the EU it made countries gang up together and against the UK which in turn rallied against the UK. Even traditional allies to the UK (The Dutch, the Danes, the Swedes and the Maltese) seem to have made it quite clear that the EU is more important to them than the UK. That's not something the UK is used to. To make matter worse there's no US or Russia to bail them out these time round. Trump doesn't like trade deals very much and Putin doesn't have any special affection towards a country who accuses him of everything under the sun.
In my opinion the EU should push to a hard Brexit or at least the UK being relegated to an EEA deal. The aim here is not to punish anybody but simply to remove the UK influence in Europe. The EU can't afford having an enemy within its camp in such delicate stage of the project.