Can you answer this question, Mr. McCain?

I'm waiting for someone to ask a question of John McCain and other supporters of Don't Ask, Don't Tell. Why do gay people successfully serve openly in the military in the following countries but not ours?

Argentina
Australia
Austria
Belgium
Brazil
Canada
Czech Republic
Denmark
Estonia
Finland
France
Germany
Ireland
Israel
Italy
Lithuania
Luxembourg
The Netherlands
New Zealand
Norway
Peru
The Philippines
Romania
Slovenia
South Africa
Spain
Sweden
Switzerland
United Kingdom

Uruguay

Shouldn't even DADT supporters be just a little concerned that so many countries have forged ahead on equality while we still lag behind?