Not "eating your own" means marching in lockstep with the leadership of a party. It means being partisan even in the face of irresponsible policies and dangerous directions.
"Eating your own" is frequently a good thing. It's human. It's intelligent and indicative of an independent and freethinking mind, which attributes led to the formation of this nation. It's the antithesis of a herd mentality, which mentality inevitably leads to tyranny.
Mr. Hannity has a herd mentality. He simply wants to be a herd leader. He increasingly is oriented toward making money. He started as a Christian and progressed steadily toward Mammon, which god he seems to be worshiping now.