great you get the difference of application and ideal concept. unfortunately your understanding only stops there, you do not try to make the logical conclusion. an idea does not become bad just because somebody who says they use it screw it up. this goes for communism and feminism. not every person calling themselves feminists ARE feminists, some are joining it because personal desire for revenge, with no concern for what the ideal wants to accomplish (equality), others join because it is 'trendy', the list goes on.
Marx thought up communism when he saw his environment in england. people working their asses off, getting abused by the employers, for complete garbage income. he was seeing poverty rampant in his time, fixing poverty would be a pretty big motivation in communism, as well as changing the system that made such a poor situation full of oppression possible in society. the USSR's application still managed to fix poverty, but still pretty sure communism was not truly applied by the USSR. saying communism does not work simply cannot be believed because true communism HAS NOT BEEN applied and tested yet.
not every person that identifies themselves as christian/muslim/bhuddhist/hindu is such and such. they may very well just be born into a family that follows it but themselves don't really care to follow/live up to the code. very much like not every person that calls themselves vegetarian are vegetarian, they may very well just be calling themselves vegetarian for a few months while they are trying to lose 50 kg, completely indifferent to the concept of vegetarianism, where life is precious.
i am not going to continue this pointless debate you have. someone that think using a small minority of bad examples that do not live up to their words, ideals, and code justifies labeling the large majority as bad as the poor examples, should really be CATCHING UP with the rest of intelligent life. that articles' author is trying to paint feminism as a horrible thing, completely ignoring their own sexist thinking, is a problem, and that the subject in there, the 'feminists' in the article cannot really be representative of all feminism.