Even Julius Peppers said after the game that it was a clean hit.
Im still trying to figure out how ^that one is dirty (he tackled Cutler the same way a kicker wouldve tackled a guy, he is just way stronger than a kicker).
In real time it looks like he threw his elbow but from a side angle and in slow motion you can clearly see that he was pushing him down with his hand and his hand slipped off.
Suh is just so powerful that any time he uses his arms to put someone in the ground it looks incredibly violent.
The guy cannot help that he is stronger than anyone we've ever seen at the DT position.