the time series shows that the distribution has changed over time. It is this change in distribution that people are opposed to.
Consider what most Americans say the "ideal" level of wealth inequality would be: http://danariely.com/2010/09/30/wealth-inequality/ and http://www.slate.com/articles/news_and_politics/politics/201...
Now consider how much wealth inequality there would be in an excessively fair society: http://www.daemonology.net/blog/2011-01-10-inequality-in-equ...
Clearly, people are determining their "ideal" without doing the math. This makes it hard to take their opposition to "this change in distribution" seriously as well.