I think people bash him/her for the quite frankly ridiculous statements Giri makes (e.g. UK PhDs are rubbish etc).
The reason why people generally jump on those that have a poor command of English, has little to do with colonial arrogance, but reflects the view that anyone seeking a postgraduate qualification (from the UK/US) should be able to articulate themselves at a postgraduate level.
If you cannot do this, you should not be anywhere near a PhD. The fact that such people slip through (unis want fees basically) reflects badly on the rest of us.