No atheist I know blames a god they don't believe in for bad things that happen. I thin you might be talking out your backside on that one.
That aside, it still doesn't address my point: arguing someone deliberately staged a brutal massacre of children to ban games is ridiculous. Using a massacre to whip up fear about games wasn't the point the other person made, that's different.
Oh, so if you don't know any atheist that blames God? Well then, you must know them all... and have to suggest I am talking out my backside? Seriously. Do you corner the market on all atheists?
Yeah, yeah my point did. People use things to whip up fury all the time, even when it doesn't have direct correlation. Seriously, it isn't hard to assume that someone can twist any act of violence into furthering their goal... that was the point.
Think about it... Kill 50 people and claim it was that someone had orange on and try to outlaw the color orange from public use. Or heck, have 20 kids killed and try and outlaw guns and games and bubble gum... when you have unlimited money and weapons and time and agents... well, you get the point.
That said, do I think that it was staged to get rid of games... no, but your question was how/why someone would do that... and that is EASY to see.