I am not a native English speaker. Although I study in England (University of Manchester), I believe half of my course mates are not native speakers either. At least the ones who turn up to lectures. People try to explain their algorithms, ideas in broken English with damn thick accents but they DO explain. They put effort.
From what he managed to write in the blog post, he CAN write English which is not THAT bad.
But this dude doesn't really bother. Hey Facebook, there's a bug. Wanna know it? How about you... beg me to tell you?
I am quoting him: whatever , i dont care for miss spelling , just the idea , i never correct an underline red word ;)
Did FB treat it properly? No. Did he act properly? Not either. But since it's FB... THEY ARE EVIL!!!!111!