Their argument: because more women have been dismissed from the Air Force under Don't Ask, Don't Tell than men, and there are many more men in the Air Force, it means the Air Force discriminates against women. The Army is bad, as well, with 36% of dismissals being women compared to 14% of the Army being women.
Firstly, this does not condone Don't Ask, Don't Tell. It's a horrible policy that should be repealed, and sexual orientation should not affect your ability to serve in the military. That out of the way, this is an example of terrible statistics.
This assumes that a gay man is just as likely to join the military as
a straight man, and that a gay woman is just as likely to join the
military as a straight woman. If you believe that gay men are less
inclined to join the military than straight men, and/or that gay women
are more inclined to join the military than straight women, this is an
I make no assertion as to the reasons for this, and I'm sorry if it's
seen as a stereotype; as a conjecture for other reasons other than the
"butch women/effeminate men" stereotype, there's a decent probability
that people don't realize DADT affects gay women, as well; certainly
the media presentation seems to focus on the dismissal of gay men, so
gay men may not wish to join in the first place while gay women don't
think it'll affect them.