Matthew Rothschild:

Republican legislators in Wisconsin aren’t the only ones getting violent threats. On Thursday, Katherine Windels pleaded not guilty to making death threats to Republican state lawmakers. Her crazed threats have gotten a lot of media attention.
But what hasn’t gotten attention is the ugliness directed against labor.
“We’ve gotten a lot of threats,” says John Matthews, executive director of Madison Teachers Inc (MTI).
MTI received a death threat on April 15.
“You’re all going to die. I’m going to kill you. I’m going to kill you,” said a man’s voice calling from the (252) area code, which MTI saw on caller ID. That area code is in North Carolina.