Honestly I think both sides miss the point - The first thing is that this is not a competition so you can't simply point out "Hey you did it too!" but I think atheists are simply to naive to even check Marxism and dismiss everything immedeatly based on the modern definition of atheism - And don't forget, it is only a lack of belief in gods because it says in the dictionary. The truth is that Marxism promotes materialism and atheism and it's a view not compatible (or hardly) with religion so it is hostile towards it - In some ways, political ideologies work like religions because there's principles and rules. It's not as simple as "both had mustaches" and all because there's a lot of complexity into it and atheism was defined as a strong non belief and not just as a lack of thereof.
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you
