I suspect the underlying cause is a combination of arrogance/entitlement and fear that English is on its way to become the next Latin.
However fear that english is on it's way to becoming the next latin? Whaaaat? I can't recall a thought like that ever coming to my mind nor ever reading somebody saying that and now that I've taken it in, I can't think of a single reason why somebody would fear that. If anything, the rest of the World should start fearing all of their languages are going the way of latin...