Using feminism to refer to issue's of men's rights is like using the phrase white power to refer to issue's about african american rights. Whatever argument you then make about broadening the meaning of the term is obviously and instantly undermined by the linguistic problems present.

Also: a LOT of people use feminism to mean "more rights for women and who cares about men?". Your more broad species of feminism is inclusive almost to the point of being meaningless. It's like using the word feminism to mean "good".