Agreed, and tucked in that middle paragraph I mention I thought it was a dive. I just saw another replay, it looks like suarez backs into the player, making it even worse of a dive.
It depends on your definition of 'dive'.
I tend to define it as 'choosing to go to ground when you can reasonably stay on your feet'. So, for me, it was a dive. There was a nudge in the back, but not enough to force him to the ground, or unbalance him to the point it's unreasonable to expect...