Down sir! BAD columnist. Fishing for compliments! You know answers posted here will be overwhelmingly either supportive or humorous - and even the latter collect downvotes (c.f. Frank Ly).
OK, on a more serious note, this would look racist if and only if it became a recurring stereotype of your unappealing eastern correspondent. Which would also be tedious. As far as I can tell, the only regular stereotype in your column is its author (and possibly his missus), and that's what we're here to read.
Having said that, I'd've left out lampooning the language. There's enough in those emails to make an article without it!
As for your editor? El Reg seems to have acquired some SJW police - possibly emanating from San Francisco. Your editor may be quaking in fear of them.