How the hell do you look at that and think he's safe? The glove is all over his arm. Pay attention to the strings. The strings all over the glove wrap around Valera's arm. That couldn't happen if the glove wasn't pressed up against him.
He's out. It was a s***** send. That's just how it is. Blame the coaches if you want but the umps got it right.
If you need something to cheer you up, I made a GIF of the adorable Field of Dreams scorebug from the exact moment Tim Anderson's home run registered in the box score.
(click on it for a higher res version of the GIF)