> The only difference is that I have the wrong background, so no one's going to try to gratuitously describe my reaction as something "postcolonial."

"I suppose it is tempting, if the only tool you have is a hammer, to treat everything as if it were a nail."

The only tool the author of that blog seems to have is their personal ideological beliefs regarding colonialism, thus the author proceeds to treat everything as if it was colonialism.