Further, at the time this happened, I didn't even know what feminism was. I was around 16 years old. It was 1978 or so. After it happened, I did some investigating and discovered what might cause such a reaction. For me, it was plain that it was a philosophy based on false premises and as such worthy of rejection. I don't go about preaching my position, but I also certainly never even silently consent to the approbation of a false idea.
Here's the real kicker: tell me what feminism is, then we'll see if we agree it's a good thing or a bad thing. (Of course, the debate on what feminism is will never reach a conclusion, so we're unlikely to get to the second part.)