"Why is "feminist" regarded as a dirty word by some people?

The women who freed 50% of the American population -- at last, to hear their names in speeches [at the Democratic convention] was the most emotional thing in the world to me. So if you don't want to call yourself a feminist, then give it all back, OK? If these women so long ago had the guts to stand up and go through what they had to go through, then have the decency to call yourself a feminist."