Claiming there's too many to list is a cop-out; I could claim the same thing about atheists. You could just pick a handful of instances, any instances.
People die because that's the term Adam and Eve agreed to with God, and Adam and Eve violated those terms, bringing corruption into creation, that's why we have to contend with death and other problems. If God just forgave people without any restitution for wrong-doing that wouldn't be just (if someone committed a crime against you, and the courts just let them off, I think you'd call that injustice).
Secular societies in real-life if anything prove why right religion is needed. Every secular society in real-life has been in decline, a tyrannical dictatorship or both; Soviet Russia (the first nation in recorded history to have an avowed goal of purging religion and replacing it with atheism), Cambodia under Pol Pot, even the decline of Sweden that began when they drank the kool-aid of godlessness. The claim that every other First-World country is less religious than the United States is false; what about the city state of the Vatican? There are European countries like Poland with a higher percentage of Christians and other religious people than the US. The Vatican is a Christian theocracy and I don't recall any mass killings there. Also, few if any mass killings in the US have been done in the name of God or by people who pray to him, your claim has no evidence and is deceitful. List examples, and please don't cop out this time. To give a few examples; the man who shot up that Florida Nightclub was a Muslim not a Christian. Anders Brevik was racially motivated while Devin Kelley was an anti-religious atheist who shot up a church due to anti-Christian prejudice and a desire to kill his mother-in-law.
While it's true that calling out falsehood is different from hating them, there is a difference between saying that something is false and using derogatory language like you do. I don't believe in aliens but I don't mock the people who do believes in them as "loonies" or mock aliens as "little green men". Though I believe God is real, it's also a true a person can hate a fictional character, so that proves nothing.
Also, do you believe in a country having the death penalty? Would you kill someone in self-defense or defense of someone you love? Killing is acceptable under certain circumstances, murder is not.