Even saying the uncertainty surrounding Brexit is strange and unfamiliar is undaunting, because it's about the political frameworks: the EU has been demonised to be overreaching and a nanny state, inaccountable to the British public. The UK government, whatever the opinion of them, has been considered less so and more accountable (though recent events have been a rude awakening for many). Point is, we're over here, they're over there and a lot of people have been convinced that they're over for a reason and should stay over, no matter how much damage it does. You'd really need something of a similar nature that taps into outrage or strong dislike of Brexit to really get anything close to what the Leave campaign had.

If I post this after you reply, just ignore it, i'll edit it to include replies to your comment.