IIRC, in their "research" they filled condoms with a fluid containing millions of microscopic balls the size of the virus.
Regardless of whether this point is valid, condoms have a 20% failure rate in real world usage in preventing pregnancy.
A woman can only get pregnant 7 to 10 days per months, if the condom fails.
But she can get HIV 365 days a year.
So by simple math, the failure rate at preventing HIV transmission for condoms will be MUCH higher than 20%, as the article in this thread proves.
I'm sure you won't mind linking me to a legitimate study that affirms the 20% figure you mention. Frankly, that seems utterly implausible, even when factoring in human error.
... when used improperly. Of course abstinence is the best way to prevent STDs, but the scare tactics of the abstinence crowd go overboard. For people with intelligence, the outrageous claims and connections make them a laughingstock just as are most of the ONDCP anti-drug commercials out there.