Morality is simple – depends on which law you follow:
 Law of the Jungle versus
 Law of Love.
A “law abiding” predator kills or is killed, eats or is eaten. He believe the end justifies the means. Winning is everything. Sacrificing others for his own needs is the rule, not the exception. Predators are “good,” prey are “good to eat,” prey who fight back are “bad.”
Of course, that is anathema to philosophies based on the “Law of Love”. Proponents of that ideal believe in harmless activity in support of one’s right to life. Highest expression is self-sacrifice for the benefit of others.
When religions taught respect for rights and the law of love, they were tolerable. When religions were infiltrated by predators, they became intolerable.