Why do the MRAs keep saying that Feminism started by so many sources?

Because 95% of them are hateful idiots who associate things they hate and don't understand logical fallacies.

They don't really have a clue, so the only way to satisfy themselves and, in a way, give themselves closure is to come up with their own "beliefs" on how it started. Many people have many beliefs, that's why there is so much "answers" to how it started. xD

They just want to confuse people. :|

They're paranoid anti-semitic losers?