It's just my adaptation of a quote from the monty python film Life Of Brian, where Brian goes up to a group of freedom fighters and asks:
"Are you the Judean People's Front?"
and they answer
"Fuck off! We're the People's Front Of Judea. The only people we hate more than the Romans are the fuckin Judean People's Front. Fuckin splitters."
Or maybe it's the other way round, and they're the JPF, I can't remember. The point is, the joke is that they're both fighting against the same thing, but the fact that the other group has split off from them and presumably followed some different idealogical line makes them end up hating the other group more than the thing they're both opposing.
It just annoys me that the Open Source movement and the term "Open source" gets mentioned everywhere while GNU and "Free Software" gets comparatively little attention. And that people think the two things are synonymous.
http://www.gnu.org/philosophy/free-software-for-freedom.html