What scares great white sharks?

Only three things on this planet hunt white sharks; bigger white sharks, Orcas, and their most deadly predator – us.
Bigger sharks will eat smaller white sharks rarely (as far as we know).
Orcas, commonly known as killer whales, are the only natural predator of white sharks. They have been well documented killing white sharks in California only to eat the liver, kind of like a white shark pate.
Humans kill over 100 million sharks every year in the oceans and we are indiscriminate killers. Usually these sharks are killed in long-line fisheries, for their fins or jaws, or just to be culled from the ocean.
So who should be afraid of whom?
Here is a stunning (real!) image of an Orca whale chasing down a Mako shark off New Zealand waters! Game over buddy...