> I think Facebook’s clause is actually clearer than many other approaches companies could take, and Facebook has been one of the better open source contributors out there. But we have a lot of problems to tackle, and convincing the world that Facebook’s patent clause is fine isn’t ours to take on. It’s their fight.
My interpretation is that due to the negative publicity that Facebook has garnered with their license, they didn't want to scare people away from using/building on top of their platform by using their library even though they themselves did not have a problem with the license.
It's understandable how that might be the final straw for Facebook when even people who don't have a problem with their license won't use their libraries for that reason.