[No Blue States]

3 have passed on. 7 are critical, no news on the perverted grudge he held. This is from the latest article I read. :(

[BlackVeil]

The impression seems to be that he had a grudge, and the Amish were nearby targets. It is not confirmed that his hostility was specifically toward them:

The gunman, Charles Carl Roberts IV, a 32-year-old truck driver from the nearby town of Bart, was bent on killing young girls as a way of "acting out in revenge for something that happened 20 years ago" when he was a boy, Miller said.

Miller refused to say what that long-ago hurt was.

Roberts was not Amish and appeared to have nothing against the Amish community, Miller said. Instead, Miller said, he apparently picked the school because it was close by, there were girls there, and it had little or no security.