That's a pretty disingenuous comment: First, your characterization is probably accurate if restricted to the "first wave" feminism (of a century ago), but, IIRC, I think we're on the "third wave" now. Second, in the American political context, feminism is highly correlated with progressives/left-wing, and the specific people I was talking about are very left-wing. Thirdly, my comment wasn't even about feminism at all, but about how people can change beliefs without changing a lot of things one might naively assume would change with them.
You brought up the broad concept of 'feminism' as an example and your comment was about people who go to either extreme, so I think I took your comment as being more anti-feminism then you meant it (no ingenuous meant to be dis'ed). I agree with your idea of how some people change beliefs but still keep the same extreme attitude.