It clearly shows he more pushed him than punched him, even in the original video you can see the full of his hand as he brings it down. I'm just surprised he hasn't done this before given how much of this he's had to put up with during his career.
I get that it's Messi and it's his first red in Spain. I don't get the calls to give him a lengthier ban. It's not that bad, it's a red card and whatever is standard for it , anything more is over the top.
Unlike you, I have no agenda here, it's quite sad you went through so much effort to let your hate and bias shine through. I'm not a Messi fan, I don't even like Barca. I appreciate and respect him as a player, I don't love him or hate him. I am capable of looking it at it without the all of that. It was a red card offence, that's all.
If you think he right hooked him into next week, then I suggest you go and see how it feels to really get hit hard in the back of the head. I can guarantee you won't go down holding your face.