It's because people don't agree with Obama's plan to give millions of people free health care. Apparently that's evil. But yeah, those people mostly don't know what socialism means. For example, Sarah Palin said:
"I don't want my down syndrome baby to go in front of Obama's death panel'
What? What death panel? From what I understand he wants to emulate the NHS to a degree... Now I'm from England, have been to hospital numerous times and have received nothing but good treatment. Not once have I had to stand in front of anything remotely like a 'death panel'. But anyway, its mostly nonsense. Treat it like kids that used to bully you, ignore them and they'll eventually get bored and stop.