....and part of their ideology was that religion was a bad thing, that there should be no religion, and those who insisted upon being religious were more useful dead.
I don't think it was quite that simple, but it doesn't really matter.
Atheists have all sorts of philosophies, and they are just as capable of fanatacism around a political belief than anyone else. Atheism is proof against nothing, other than theistic belief.
Just because atheists had OTHER reasons to kill people as well didn't absolve them from killing because they preferred atheism.
Who's absolving them? Killers are killers. When we get told they killed because of atheism, it seems a nonsense, but can atheists be fundamentalist sociopaths happy to watch the world burn for their beliefs? Sure.
As to that....the theocracies that were guilty of democide were 'killing in the name of God...' but generally they had to twist the teachings of whatever god they were killing in the name of. They too were doing so for their 'ideology' ...but mostly for the power grab. The Crusades come very strongly to mind. Saving the Holy Land from the infidel was the excuse...but the REASON was to conquer, grab....and find occupations for their barons (and land and income) that didn't involve looking with avarice at the throne at home.
Again, I think you're oversimplifying, but I get your point.
Still, the Crusades were called for by the head of the largest Christian Church body there is. Its difficult for the Catholic Church to decry their responsibility, just like it's hard for communists to decry responsibility for those atrocities. Their specific beliefs helped enable and inflame the situation. General theism or atheism is beside the point. The difference with the communists is that they hard-wired atheism into their ideology, and also did 'fun' things like form the League of Militant Atheists. Unlike the Pope, they have no rights to speak for atheists, and we are not a coherent or clearly defined body. So basically, sure, atheists can be murderous pigs, just like anyone else. But atheism is a nothing. It doesn't inform action. Whatever the person believes informs action.
In the final analysis, the killing is all about personal power for the leaders, or land grabs. It's never really about God. What I resent, and resent mightily, is this claim by atheists that somehow there is a moral high ground that atheists hold...that theists do not hold.
There are plenty of religious leaders who would disagree. And plenty of Christian soldiers who would too.
Atheism doesn't hold any 'high moral ground'. People who claim it does are wrong. It happens.
It's all there in "Imagine"....and a more stupid song I have NEVER heard.
Really? I could name a bunch.
The Battle Hymn of the Republic comes to mind...
Mine eyes have seen the glory of the coming of the Lord
He is trampling out the vintage where the grapes of wrath are stored
He hath loosed the fateful lightning of His terrible swift sword
His truth is marching on
I mean, really. if you atheists are right, and there is no god, then there is no god to blame. Just us. And there is nothing about there NOT being a god that would prevent atheists from being just as bloody minded as any theist.
All true. Did someone say that was not true? Did an atheist somewhere blame God? That seems bizarre.
Atheists ALL have beliefs, and can be bloody minded for those beliefs.
And nothing does. Because they are. Just like the rest of us.
Look at this another way. Do you think Jains are as violent as Boko Haram? No?
Specific types of theism can impact on people's actions in terms of violence, both for better and for worse. Theism, as an umbrella term, isn't informative about the specific theistic beliefs. Atheism, on the other hand, does neither. It is not pacifist, nor aggressive. Atheists all have beliefs, and depending on what those are, they can be pacifist or aggressive. The communists mentioned were extreme fundamentalists (in terms of the leadership). Secular Humanists are much more pacifist. But atheism? In and of itself? It is meaningless.