How is terrible grammar superimposed over an image of a dog meant to be funny?

I believe it isn't so much the terrible grammar as it is the dog's expression.

such joke very humor.

it takes all kinds.

I had an idiot come in bleeding the other day. And all he could tel the nurse was "Much knife. Such stab. Wow."

fuck that dog.

he made it to the clinic? Damn.

That's precisely the idiocy I would expect.

At least French memes are politically relevant. Sarkozy was here? Brilliant.

Humour comes in all flavours, I'm afraid. Otherwise, I would be a wealthy man.