I'm not much of a politically minded person but wasn't he referring to the fact that most players as you highlight are indeed not from Europe but the rest of the world?
I don't think he needed to be so opportunistic either way though, I get tired of people on both sides using the Brexit debate for other areas of life other than politics. They are all as bad as each other.
Either way the historical demographics don't surprise me given the spread of the commonwealth, good to see so many people interested in watching and playing the great sport of cricket.
RE: An Open Letter to Jacob Rees-Mogg