Feminism is an incredibly simple concept: "stop being mean to women." The idea that feminism could do any harm at all betrays a severe misunderstanding of either feminism or harm, if not both.
It was - is - an ironic interpretation, and funny.
That said, yes if a horde of random people make such comments, it is unlikely that one parses them for nuance, and at some point one may run out of good will, and of belief in mankind.