I could be wrong, but I think he's trying to say he has unrealistic expectations of the officer corps' ability to understand current events and consider unexpected outcomes. On the specific point of being surprised that the UK voted to exit the EU, I'm willing to bet that even David Cameron was taken aback. Polling the week prior indicated that ~75% of the public supported remaining in the EU.
On the second point, I have no idea what he's trying to say. As written, he states that BREXIT will "[reflect] our election". So an event that just happened reflects one in the future? Maybe he meant our current election cycle and associated political noise influenced the voting public in the UK? If that's the case, I'd say that is indeed possible.
Bottom line, if you're going to pass yourself off as enlightened, at least use proper grammar. Everybody knows that effective written communication is essential to being a credible pompous ass.
BTW, that was a nice use of "Cheers!" at the end, it really cemented the overall douchiness of the post.