Of course, a tree or a rock or an orange has never lied to anyone, either. A paper towel has never cut me off in traffic. A pair of shoes has never taken too long ordering food in the drive thru while I'm starving to death a few cars behind. A box of crayons has never texted in a movie theater. A dandelion has never deleted the show I had saved on the DVR. Plants, animals, and inanimate objects have never committed any evil acts at all, because they are not capable of committing evil acts. It is not a mushroom's superior virtue that prevents it from becoming a terrorist; it is the fact that it's a mushroom. Your dog cannot hurt you like your brother can hurt you, because he is a dog. It's not that he's making better moral choices than the humans in your life, it's that he's not making any moral choices at all.
It is pure unadulterated narcissism that leads a man in this direction. He is rejecting the entire human race because the human race requires too much of him. It is not subservient enough. It will not lie down and lick his palms, so he dismisses it outright. And here is the most tragic thing of all: while he protects himself from greater pains by idolizing a lesser being, he has excluded himself from the greater joy that comes from loving a greater being. I'm afraid that one day, when he's dying alone with only his mutt to mourn him, he'll regret that choice.