You talk as if teaching English is a type of rocket science. It isn't. It is mostly an unskilled job that almost anyone who can speak English can carry out.

If a Russian or German teaches it basically I don't give a shit, although the students will have difficulty with the accents.

No reasons why either of us should care too much, you haven't taught English since the year dot and I am not far behind you.

In the same way as you need paraffin to drive a jet engine and not muddy water, you need to install a native-born English speaker in the classroom to drive the class towards fairly good English- and that has sod all to do with any rocket scientist expertise!

Your above post makes no sense at all though. In the first sentence you rant on about the bloody scientist and then you say this: I

f a Russian or German teaches it basically I don't give a shit, although the students will have difficulty with the accents