Wow, that is pretty disingenuous. Clearly, BSD+Patents places some extra conditions on the BSD license, you don't have to be a lawyer to understand that. I mean, several people have provided the legal reasons elsewhere on this thread, but even the name "BSD PLUS Patents" should be a tip-off.
No, its not at all disingenuous. Facebook could have written the "Additional Grant of Patent Rights" (note: additional) to also terminate the copyright grant under the BSD license. But they did not:
https://github.com/facebook/react/blob/master/PATENTS
