First, whether you like React or not, it's hard to argue that the most popular JavaScript framework is "just smoke and mirrors". It might be great PR, but there's also a lot of substance to it.

Second, even if publiccode.eu doesn't help Facebook in any way, that's not evidence that they have motive to intentionally block it. You'd have to demonstrate that they have some reason to want the initiative to fail, not just claim they don't care.