An online video claims that Feminism Was Created To Destabilize Society. It was some sort of Rockefeller/CIA plot. The purpose was to get a lot more women into the workforce in order to increase the tax base, and to break down the nuclear family so that kids will see the state as the family, and be more easily brainwashed by the schools. This purpose shows the feminist movement to be evil, not benign.
The conspiracy theory seems a little far-fetched, but the causation theory is not. Any time there is a large social movement, the important thing is to look at the results of the movement, not the motivation of the leaders. If the movement benefits certain economic interests or political ideologies, then those interests and ideologies will be working to support the movement. There are ideologies that work to break down the nuclear family, and if feminism assists in that goal, so much the better. That's the way some people see it, anyway.