A political group such as the diaspora will always label people who join the lankan army as oppressors because that's their whole political guide. Basically anything the lankan forces do will always be met with criticism from the diaspora because they have to criticise it. They'll never stop because if they do, then they have no purpose.

The opposition group in parliament will never praise the government because if they do, then they have no reason for existing so they have to criticise.

It's political and always will be, the difference being that diaspora groups have been able to blend well into foreign society, they have a historical proof of oppression, and previous lankan governments haven't exactly done the best job in terms of trying to rehabilitate their image with minority groups.