If it is true (and from what I know/see) most of it is, then no one should be offended. However, the things pointed out on the website does not only pertain to Qatar but also to the rest of the Middle Eastern Countries.
It is very sad that these things happen (especially in a Muslim Country). All these Countries forget that 20-30 years ago they were on camel backs & God fulfilled their wishes & prayers by giving them so much only to test them how they will use that wealth, well we all know how the maids are treated & what they are paid. I cant understand how can people go to Mecca 5-6 times in a years and still not see themselves as modern slave owners.