The problem isn't just conservatives trying to score points by falsely linking gun control to massacres. It's also liberals who aren't paying enough attention and think they're saying something about Wounded Knee.
As you may recall, I dissected this image in Phony Pro-Gun Indian Image. Now another site has chimed in with a debunking:
Was There an 1890 School Shooting Worse than Sandy Hook?
The Wounded Knee Massacre was a terrible tragedy in which nearly 300 mostly-unarmed Indians were killed. To categorize it as a school shooting, however, is completely without merit.