- one of GPL's cool thing is that it prevents proprietary software from including GPL'd code without contributing back to the community
- Because BSD is not as strict as GPL regarding license derivation, GPL says "BSD is bad, you're allowing proprietary software to use BSD code without giving back"
- Some people take BSD code, modify it and distribute modifications under GPL
- Because of this, the original BSD code authors can't benefit from the modifications, only GPL projects can... doing exactly what GPL was against in the first place (preventing authors from enjoying modifications)
Theo is only pointing out the irony of it all.