Uneducated ~> poor, Educated ~> wealthy.
Don't you think opposition to mass immigration policy supported by the pro-EU side might have something to do with lower income/education class voting leave? Something at all... maybe a little bit?
Perhaps, though you might not have noticed it, they were voting their self interest?
Is it surprising that highly educated class wouldn't feel threatened by importing more low-skilled immigrants?
I'm simply illustrating that, it's not as simple as the smart people supported remain, so that's the smarter choice. Smarter for whom?