Why people treat women and men as separation species? It is because we have seen the competition among them Aren't we fools?
The first part of your question is confusing or wrong, I can't say which. Feminism has always been there not just in modern world. I think now since we have internet you hear it more often.
As to why it is more of antimale, as that is what feminism is all about in present wave. Being antimale is beneficial and is good n easy business for feminists.