"Uneducated"

Someone I know personally has recently been slinging the insult "uneducated" toward people she disagrees with politically. She, however, did not graduate eighth grade and has a low level of literacy. I don't really know how to react to this. Even if people are uneducated, does that make them bad people? Does it make them unable to have reasoned opinions on political issues? And how does an uneducated person assert her superiority to others by suggesting that they are uneducated? Is the insult that entrenched that she can say it without blinking?