If you need to be convinced that mistreating people is wrong there is no point arguing.

The fact that decades ago something was considered wrong, and since has been accepted, makes it no excuse for it to be considered wrong today.

And no, the morality and understanding of the world should not be pinned to the Anglo-sphere, but the west just happens to be the most progressive in terms of human rights at this moment in history. If Quatar wants to take the lead and ask all other countries to follow, by all means.