Simon remained conventionally liberal until the 1990s when he began asking questions in response to events such as the O.J. Simpson murder trial. Simon, a former civil rights activist in the 1960s, said he was shocked by "the kind of essential dishonesty to justice" of Simpson's acquittal. Simon said, "I found the use of racial politics in the O.J. trial so repellent to me, morally, but also, I couldn't believe it was happening right there in front of my eyes. It started to shake up some things. And then came 9/11."